epiphany/spec/EVIDENCE_P13S26_EXECUTION.md

129 KiB

Evidence — P13-S26 execution

Not part of the candidate's normative content. Touch row 8 of spec/CONTRACT_P13S26_INVARIANT10_SURFACE.md. This file is the destination gates 6 and 7 require: every mutation transcript and boundary-gate output, recorded verbatim rather than summarised.

Contract ratified at 01c621d; amendment 1 at f9170b0; amendment 2 at 86bf7c6. Executed 2026-08-11.


§1. Structural baseline

After pins 3, 4, 5, 6, 7, 8 and 10, before any mutation:

suites=43 passed=1586 failed=0 ignored=0

The pre-rung baseline was 42 suites / 1583. This rung adds one suite (invariant_ten_surface) carrying three tests. Pin 8 narrowed and renamed t12; it was not deleted, so no test was removed.

Pin 4's count movement was measured, never predicted. First run after the requirement was added:

assertion `left == right` failed
  left: 286
 right: 285

CORE_REQUIREMENT_COUNT 214 → 215; SUITE_REQUIREMENT_COUNT 285 → 286; SUITE_LABEL_COUNT 285 → 286.


§2. Expected-versus-observed matrix

Every mutation ran against the full workspace with --no-fail-fast, was restored by writing back the captured original bytes (never git), and the baseline was re-verified. §3's "Must fail" cells are exhaustive; a mismatch is a finding.

M # Expected Observed Verdict
M1-A 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1-B 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1-C 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1-D 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1-E 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1-F 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1b 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1c 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M1d 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M2 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M7 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M8 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M9 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M14 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M18 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M19 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M20 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M21 1 specification_item_ten_names_exactly_the_derived_surface specification_item_ten_names_exactly_the_derived_surface MATCH
M4-A 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4-B 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4-C 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4-D 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4-E 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4-F 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4b 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4c 2 implementation_doc_names_exactly_the_derived_surface, invariants::g3a_tests::t12_invariant_10_doc_block_slices_and_is_non_empty implementation_doc_names_exactly_the_derived_surface, invariants::g3a_tests::t12_invariant_10_doc_block_slices_and_is_non_empty MATCH
M4d 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M4e 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M10 1 implementation_doc_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface MATCH
M5 5 aleatoric_reference_locality_states_both_referents_and_locality, every_requirement_block_has_one_label, every_requirement_citation_is_defined, requirement_labels_are_unique_across_the_suite, requirement_labels_follow_the_grammar aleatoric_reference_locality_states_both_referents_and_locality, every_requirement_block_has_one_label, every_requirement_citation_is_defined, requirement_labels_are_unique_across_the_suite, requirement_labels_follow_the_grammar MATCH
M6 3 aleatoric_reference_locality_states_both_referents_and_locality, every_requirement_citation_is_defined, requirement_label_areas_match_their_chapters aleatoric_reference_locality_states_both_referents_and_locality, every_requirement_citation_is_defined, requirement_label_areas_match_their_chapters MATCH
M11 1 aleatoric_reference_locality_states_both_referents_and_locality aleatoric_reference_locality_states_both_referents_and_locality MATCH
M12 1 aleatoric_reference_locality_states_both_referents_and_locality aleatoric_reference_locality_states_both_referents_and_locality MATCH
M13 1 aleatoric_reference_locality_states_both_referents_and_locality aleatoric_reference_locality_states_both_referents_and_locality MATCH
M16 1 aleatoric_reference_locality_states_both_referents_and_locality aleatoric_reference_locality_states_both_referents_and_locality MATCH
M15 2 implementation_doc_names_exactly_the_derived_surface, specification_item_ten_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface, specification_item_ten_names_exactly_the_derived_surface MATCH
M17 2 implementation_doc_names_exactly_the_derived_surface, specification_item_ten_names_exactly_the_derived_surface implementation_doc_names_exactly_the_derived_surface, specification_item_ten_names_exactly_the_derived_surface MATCH
M3 — passing control: M1-B stops failing no failures; 1586 passed, 0 failed MATCH

38 mutations, 38 matches. No listed test passed unexpectedly; no unlisted test failed.


§3. Mutation transcripts

Each entry carries the complete --no-fail-fast failure set and the failing assertion verbatim, untruncated.

M1-A

Mutation. delete RepeatStructure.voltas from item 10's nested itemize (group A)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1834491) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1-B

Mutation. delete StaffInstance.instrument_override (group B)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1836196) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1-C

Mutation. delete StaffBasedContent.default_metric_grid (group C)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1837920) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1-D

Mutation. delete NotatedComponent.tuplet (group D)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1839618) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1-E

Mutation. delete IndeterminacyHints.alternatives (group E)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1844537) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1-F

Mutation. delete TempoSegment.end (group F)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1846695) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1b

Mutation. add a token not in INVARIANT_TEN_SURFACE

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1848415) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("Bogus.token", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1c

Mutation. change one target to a different vocabulary term (Slur.start_event → declared staff)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1850117) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "declared staff"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M1d

Mutation. change one target to a term outside pin 1a's vocabulary

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1852414) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:187:13:
core_spec.tex item 10: target for Slur.start_event uses "nonexistent target", outside pin 1a's vocabulary. Ordering cannot catch this -- a bad term sorts fine
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M2

Mutation. restore item 10 to its pre-rung sentence in full

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1854242) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:229:5:
assertion `left == right` failed: item 10's opening sentence must occur exactly once inside req:graph:score-graph-invariants; found 0
  left: 0
 right: 1
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M7

Mutation. move one row into a second nested itemize inside item 10

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1855925) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M8

Mutation. narrow test 1's slice so it drops the final nested \item

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1857779) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:267:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M9

Mutation. duplicate one \item inside the nested itemize

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1859584) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:174:5:
core_spec.tex item 10 lists ["Marker.anchor"] more than once; set comparison cannot see a duplicate, so it is checked here
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M14

Mutation. permute a complete existing target (set unchanged, order wrong)

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1861255) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:181:9:
assertion `left == right` failed: core_spec.tex item 10: target for AnalyticalAnnotation.anchor is not in pin 1a's canonical order
  left: "live event, extant region, anchor target"
 right: "anchor target, extant region, live event"
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M18

Mutation. add \label {tmp:m18} — spaced, non-req: — inside item 10's outer slice

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1862920) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:244:5:
item 10 must contain no \label: pin 3 adds no label and no requirement block.
Slice was:
\item Except where the re-anchoring rules of Chapter~\ref{ch:semops} explicitly permit transient dangling states during edits, every graph reference resolves to an extant object. \label {tmp:m18} Every cross-cutting structure's references resolve to extant objects in the graph, except where explicit re-anchoring rules permit transient dangling states during edits (see Chapter~\ref{ch:semops}). Tempo-map conditions that are not reference resolution --- segment ordering and non-overlap --- are governed by Requirement~\ref{req:time:tempo-segment-order}, not by this invariant. The complete reference surface is: \begin{itemize} \item \texttt{Slur.start\_event} --- live event. \item \texttt{Slur.end\_event} --- live event. \item \texttt{Tie.start\_event} --- live event. \item \texttt{Tie.end\_event} --- live event. \item \texttt{Beam.events} --- live event. \item \texttt{SubBeam.events} --- live event. \item \texttt{Tuplet.members} --- live event. \item \texttt{Tuplet.parent} --- extant tuplet. \item \texttt{Spanner.staves} --- declared staff. \item \texttt{Spanner.start} --- anchor target. \item \texttt{Spanner.end} --- anchor target. \item \texttt{Marker.anchor} --- anchor target. \item \texttt{RepeatStructure.start} --- anchor target. \item \texttt{RepeatStructure.end} --- anchor target. \item \texttt{RepeatStructure.kind} --- anchor target. \item \texttt{RepeatStructure.voltas} --- anchor target. \item \texttt{ChordSymbol.anchor} --- anchor target. \item \texttt{AnalyticalAnnotation.anchor} --- anchor target, extant region, live event. \item \texttt{AnalyticalAnnotation.layer} --- declared analysis layer. \item \texttt{Comment.anchor} --- anchor target, extant region, live event. \item \texttt{GraphicGesture.objects} --- stored graphic object. \item \texttt{GraphicGesture.anchoring} --- anchor target, declared staff, live event. \item \texttt{LyricLine.events} --- live event. \item \texttt{Staff.instrument} --- declared instrument. \item \texttt{StaffInstance.instrument\_override} --- declared instrument. \item \texttt{Staff.group} --- declared staff group. \item \texttt{StaffGroup.members} --- declared staff. \item \texttt{PartDefinition.staves} --- declared staff. \item \texttt{ViewDefinition.active\_layers} --- declared analysis layer. \item \texttt{MetricTimeModel.meters} --- declared time signature. \item \texttt{StaffBasedContent.default\_metric\_grid} --- declared time signature. \item \texttt{Measure.time\_signature} --- declared time signature. \item \texttt{StaffInstance.local\_metric\_grid} --- declared time signature. \item \texttt{NotatedComponent.tuplet} --- extant tuplet. \item \texttt{IndeterminacyHints.alternatives} --- live event. \item \texttt{TrajectoryEvent.start} --- live pitch. \item \texttt{TrajectoryEvent.end} --- live pitch. \item \texttt{GraphicEvent.graphics} --- stored graphic object. \item \texttt{CueEvent.source} --- live event. \item \texttt{TempoSegment.start} --- anchor target. \item \texttt{TempoSegment.end} --- anchor target. \end{itemize}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M19

Mutation. truncate the real opening and place one complete anchor after the nested list

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1864612) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:229:5:
assertion `left == right` failed: item 10's opening sentence must occur exactly once inside req:graph:score-graph-invariants; found 0
  left: 0
 right: 1
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M20

Mutation. add a spaced, additive, label-free \begin {requirement} inside item 10

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1866299) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:249:5:
item 10 must contain no requirement block.
Slice was:
\item Except where the re-anchoring rules of Chapter~\ref{ch:semops} explicitly permit transient dangling states during edits, every graph reference resolves to an extant object. \begin {requirement} Probe. \end {requirement} Every cross-cutting structure's references resolve to extant objects in the graph, except where explicit re-anchoring rules permit transient dangling states during edits (see Chapter~\ref{ch:semops}). Tempo-map conditions that are not reference resolution --- segment ordering and non-overlap --- are governed by Requirement~\ref{req:time:tempo-segment-order}, not by this invariant. The complete reference surface is: \begin{itemize} \item \texttt{Slur.start\_event} --- live event. \item \texttt{Slur.end\_event} --- live event. \item \texttt{Tie.start\_event} --- live event. \item \texttt{Tie.end\_event} --- live event. \item \texttt{Beam.events} --- live event. \item \texttt{SubBeam.events} --- live event. \item \texttt{Tuplet.members} --- live event. \item \texttt{Tuplet.parent} --- extant tuplet. \item \texttt{Spanner.staves} --- declared staff. \item \texttt{Spanner.start} --- anchor target. \item \texttt{Spanner.end} --- anchor target. \item \texttt{Marker.anchor} --- anchor target. \item \texttt{RepeatStructure.start} --- anchor target. \item \texttt{RepeatStructure.end} --- anchor target. \item \texttt{RepeatStructure.kind} --- anchor target. \item \texttt{RepeatStructure.voltas} --- anchor target. \item \texttt{ChordSymbol.anchor} --- anchor target. \item \texttt{AnalyticalAnnotation.anchor} --- anchor target, extant region, live event. \item \texttt{AnalyticalAnnotation.layer} --- declared analysis layer. \item \texttt{Comment.anchor} --- anchor target, extant region, live event. \item \texttt{GraphicGesture.objects} --- stored graphic object. \item \texttt{GraphicGesture.anchoring} --- anchor target, declared staff, live event. \item \texttt{LyricLine.events} --- live event. \item \texttt{Staff.instrument} --- declared instrument. \item \texttt{StaffInstance.instrument\_override} --- declared instrument. \item \texttt{Staff.group} --- declared staff group. \item \texttt{StaffGroup.members} --- declared staff. \item \texttt{PartDefinition.staves} --- declared staff. \item \texttt{ViewDefinition.active\_layers} --- declared analysis layer. \item \texttt{MetricTimeModel.meters} --- declared time signature. \item \texttt{StaffBasedContent.default\_metric\_grid} --- declared time signature. \item \texttt{Measure.time\_signature} --- declared time signature. \item \texttt{StaffInstance.local\_metric\_grid} --- declared time signature. \item \texttt{NotatedComponent.tuplet} --- extant tuplet. \item \texttt{IndeterminacyHints.alternatives} --- live event. \item \texttt{TrajectoryEvent.start} --- live pitch. \item \texttt{TrajectoryEvent.end} --- live pitch. \item \texttt{GraphicEvent.graphics} --- stored graphic object. \item \texttt{CueEvent.source} --- live event. \item \texttt{TempoSegment.start} --- anchor target. \item \texttt{TempoSegment.end} --- anchor target. \end{itemize}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M21

Mutation. duplicate the complete anchor elsewhere inside req:graph:score-graph-invariants

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1867965) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:229:5:
assertion `left == right` failed: item 10's opening sentence must occur exactly once inside req:graph:score-graph-invariants; found 2
  left: 2
 right: 1
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4-A

Mutation. delete RepeatStructure.voltas from the /// 10. block

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1874775) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4-B

Mutation. delete StaffInstance.instrument_override

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1881551) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4-C

Mutation. delete StaffBasedContent.default_metric_grid

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1888357) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4-D

Mutation. delete NotatedComponent.tuplet

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1895125) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4-E

Mutation. delete IndeterminacyHints.alternatives

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1901908) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4-F

Mutation. delete TempoSegment.end

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1908718) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4b

Mutation. add a token not in the inventory to the doc block

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1915525) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("Bogus.token", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4c

Mutation. destroy the /// 10. block entirely

Complete --no-fail-fast failure set (full workspace, 1584 passed / 2 failed):

  implementation_doc_names_exactly_the_derived_surface
  invariants::g3a_tests::t12_invariant_10_doc_block_slices_and_is_non_empty

Failing assertion, verbatim:

---- invariants::g3a_tests::t12_invariant_10_doc_block_slices_and_is_non_empty stdout ----

thread 'invariants::g3a_tests::t12_invariant_10_doc_block_slices_and_is_non_empty' (1921013) panicked at crates/epiphany-core/src/invariants.rs:4646:14:
invariant 10's doc comment is present

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1922314) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4d

Mutation. change one doc-block target to a different vocabulary term

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1929083) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:382:5:
assertion `left == right` failed
  left: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "declared staff"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
 right: {("AnalyticalAnnotation.anchor", "anchor target, extant region, live event"), ("AnalyticalAnnotation.layer", "declared analysis layer"), ("Beam.events", "live event"), ("ChordSymbol.anchor", "anchor target"), ("Comment.anchor", "anchor target, extant region, live event"), ("CueEvent.source", "live event"), ("GraphicEvent.graphics", "stored graphic object"), ("GraphicGesture.anchoring", "anchor target, declared staff, live event"), ("GraphicGesture.objects", "stored graphic object"), ("IndeterminacyHints.alternatives", "live event"), ("LyricLine.events", "live event"), ("Marker.anchor", "anchor target"), ("Measure.time_signature", "declared time signature"), ("MetricTimeModel.meters", "declared time signature"), ("NotatedComponent.tuplet", "extant tuplet"), ("PartDefinition.staves", "declared staff"), ("RepeatStructure.end", "anchor target"), ("RepeatStructure.kind", "anchor target"), ("RepeatStructure.start", "anchor target"), ("RepeatStructure.voltas", "anchor target"), ("Slur.end_event", "live event"), ("Slur.start_event", "live event"), ("Spanner.end", "anchor target"), ("Spanner.start", "anchor target"), ("Spanner.staves", "declared staff"), ("Staff.group", "declared staff group"), ("Staff.instrument", "declared instrument"), ("StaffBasedContent.default_metric_grid", "declared time signature"), ("StaffGroup.members", "declared staff"), ("StaffInstance.instrument_override", "declared instrument"), ("StaffInstance.local_metric_grid", "declared time signature"), ("SubBeam.events", "live event"), ("TempoSegment.end", "anchor target"), ("TempoSegment.start", "anchor target"), ("Tie.end_event", "live event"), ("Tie.start_event", "live event"), ("TrajectoryEvent.end", "live pitch"), ("TrajectoryEvent.start", "live pitch"), ("Tuplet.members", "live event"), ("Tuplet.parent", "extant tuplet"), ("ViewDefinition.active_layers", "declared analysis layer")}
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M4e

Mutation. change one doc-block target to a term outside the vocabulary

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1935871) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:187:13:
invariants.rs invariant-10 doc block: target for Slur.start_event uses "nonexistent target", outside pin 1a's vocabulary. Ordering cannot catch this -- a bad term sorts fine
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M10

Mutation. duplicate one line in the doc block

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  implementation_doc_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1942674) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:174:5:
invariants.rs invariant-10 doc block lists ["Marker.anchor"] more than once; set comparison cannot see a duplicate, so it is checked here
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M5

Mutation. delete pin 4's requirement from core_spec.tex

Complete --no-fail-fast failure set (full workspace, 1581 passed / 5 failed):

  aleatoric_reference_locality_states_both_referents_and_locality
  every_requirement_block_has_one_label
  every_requirement_citation_is_defined
  requirement_labels_are_unique_across_the_suite
  requirement_labels_follow_the_grammar

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (1953135) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:395:10:
core_spec.tex declares req:time:aleatoric-reference-locality
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- every_requirement_block_has_one_label stdout ----

thread 'every_requirement_block_has_one_label' (1953158) panicked at crates/epiphany-testkit/tests/requirement_labels.rs:264:5:
assertion `left == right` failed
  left: 214
 right: 215
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- requirement_labels_follow_the_grammar stdout ----

thread 'requirement_labels_follow_the_grammar' (1953163) panicked at crates/epiphany-testkit/tests/requirement_labels.rs:299:5:
assertion `left == right` failed
  left: 285
 right: 286

---- every_requirement_citation_is_defined stdout ----

thread 'every_requirement_citation_is_defined' (1953159) panicked at crates/epiphany-testkit/tests/requirement_labels.rs:459:5:
assertion `left == right` failed
  left: 285
 right: 286

---- requirement_labels_are_unique_across_the_suite stdout ----

thread 'requirement_labels_are_unique_across_the_suite' (1953162) panicked at crates/epiphany-testkit/tests/requirement_labels.rs:369:5:
assertion `left == right` failed
  left: 285
 right: 286

M6

Mutation. relabel pin 4's requirement into the req:graph: area

Complete --no-fail-fast failure set (full workspace, 1583 passed / 3 failed):

  aleatoric_reference_locality_states_both_referents_and_locality
  every_requirement_citation_is_defined
  requirement_label_areas_match_their_chapters

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (1954840) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:395:10:
core_spec.tex declares req:time:aleatoric-reference-locality
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- requirement_label_areas_match_their_chapters stdout ----

thread 'requirement_label_areas_match_their_chapters' (1954867) panicked at crates/epiphany-testkit/tests/requirement_labels.rs:345:5:
core_spec.tex:2761 chapter "Time and Duration" requires area "time", found req:graph:aleatoric-reference-locality
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- every_requirement_citation_is_defined stdout ----

thread 'every_requirement_citation_is_defined' (1954865) panicked at crates/epiphany-testkit/tests/requirement_labels.rs:500:5:
req:time:aleatoric-reference-locality: crates/epiphany-core/src/invariants.rs, crates/epiphany-testkit/tests/invariant_ten_surface.rs, crates/epiphany-testkit/tests/requirement_labels.rs, spec/CONTRACT_P13S26_INVARIANT10_SURFACE.md, spec/core_spec.tex

M11

Mutation. replace “same region” with “any region”

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (1956581) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:406:9:
req:time:aleatoric-reference-locality must state "same region"; block was:
\begin{requirement} \label{req:time:aleatoric-reference-locality} Every event referenced by an aleatoric region's \texttt{ordering} DAG, and every event used as a key in its \texttt{bounds} map, \MUST{} be an event of any region. Naming an event that does not exist is a dangling reference, governed by graph invariant~10; naming an event that exists in a \emph{different} region is a distinct defect, and this requirement is what forbids it. Neither the ordering DAG nor the bounds map may reach outside the region whose time model declares them.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M12

Mutation. delete the ordering referent from pin 4's requirement

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (1959790) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:406:9:
req:time:aleatoric-reference-locality must state "ordering"; block was:
\begin{requirement} \label{req:time:aleatoric-reference-locality} Every event used as a key in its \texttt{bounds} map, \MUST{} be an event of that same region. Naming an event that does not exist is a dangling reference, governed by graph invariant~10; naming an event that exists in a \emph{different} region is a distinct defect, and this requirement is what forbids it. The bounds map may not reach outside the region whose time model declares them.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M13

Mutation. delete the bounds referent from pin 4's requirement

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (1962090) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:406:9:
req:time:aleatoric-reference-locality must state "bounds"; block was:
\begin{requirement} \label{req:time:aleatoric-reference-locality} Every event referenced by an aleatoric region's \texttt{ordering} DAG \MUST{} be an event of that same region. Naming an event that does not exist is a dangling reference, governed by graph invariant~10; naming an event that exists in a \emph{different} region is a distinct defect, and this requirement is what forbids it. The ordering DAG may not reach outside the region whose time model declares them.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M16

Mutation. weaken \MUST{} to \SHOULD{}

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (1964856) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:406:9:
req:time:aleatoric-reference-locality must state "\\MUST{}"; block was:
\begin{requirement} \label{req:time:aleatoric-reference-locality} Every event referenced by an aleatoric region's \texttt{ordering} DAG, and every event used as a key in its \texttt{bounds} map, \SHOULD{} be an event of that same region. Naming an event that does not exist is a dangling reference, governed by graph invariant~10; naming an event that exists in a \emph{different} region is a distinct defect, and this requirement is what forbids it. Neither the ordering DAG nor the bounds map may reach outside the region whose time model declares them.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M15

Mutation. duplicate one entry inside INVARIANT_TEN_SURFACE

Complete --no-fail-fast failure set (full workspace, 1584 passed / 2 failed):

  implementation_doc_names_exactly_the_derived_surface
  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1949443) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:136:5:
INVARIANT_TEN_SURFACE repeats ["Marker.anchor"]; a repeat collapses silently into the expected set and would let both documents drop a class
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1949444) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:136:5:
INVARIANT_TEN_SURFACE repeats ["Marker.anchor"]; a repeat collapses silently into the expected set and would let both documents drop a class

M17

Mutation. put an out-of-vocabulary target on one INVARIANT_TEN_SURFACE entry

Complete --no-fail-fast failure set (full workspace, 1584 passed / 2 failed):

  implementation_doc_names_exactly_the_derived_surface
  specification_item_ten_names_exactly_the_derived_surface

Failing assertion, verbatim:

---- implementation_doc_names_exactly_the_derived_surface stdout ----

thread 'implementation_doc_names_exactly_the_derived_surface' (1951281) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:143:13:
INVARIANT_TEN_SURFACE target "nonexistent target" for Marker.anchor uses "nonexistent target", which is outside pin 1a's vocabulary
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- specification_item_ten_names_exactly_the_derived_surface stdout ----

thread 'specification_item_ten_names_exactly_the_derived_surface' (1951282) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:143:13:
INVARIANT_TEN_SURFACE target "nonexistent target" for Marker.anchor uses "nonexistent target", which is outside pin 1a's vocabulary

§4. M3 — the passing control

The rung's only mutation whose required outcome is success.

Applied together: test 1's comparison weakened from assert_eq!(actual, expected) to assert!(actual.is_subset(&expected)) — that direction specifically, since expected.is_subset(&actual) still fails after a deletion — and M1-B (delete StaffInstance.instrument_override from item 10's nested list).

observed failures: none
suites=43 passed=1586 failed=0 ignored=0

M1-B stopped failing. Equality is load-bearing: without this control, nothing distinguishes an exact inventory from a spot-check. There is no assertion diagnostic to quote, and that absence is the evidence.


§5. Gate 6 — pin 9's boundary check, verbatim

git diff --cached -U0 -- crates/epiphany-core/src/invariants.rs:

diff --git a/crates/epiphany-core/src/invariants.rs b/crates/epiphany-core/src/invariants.rs
index 80c8a79..9d739ad 100644
--- a/crates/epiphany-core/src/invariants.rs
+++ b/crates/epiphany-core/src/invariants.rs
@@ -69,12 +69,61 @@ pub enum GraphInvariant {
-    /// 10. Every graph reference resolves to an extant object: cross-cutting
-    ///     structures (incl. anchor targets, annotation layers, tuplet parents,
-    ///     graphic objects) and event-internal references (indeterminate
-    ///     alternatives, trajectory event-pitches, graphic objects, cue sources);
-    ///     structural top-level references (a staff's declared instrument, a
-    ///     staff's group, a staff group's members, a part's staves, a view's
-    ///     active layers — genesis tranche G3a repairs this prose to name what
-    ///     the check body already enforced); and meter/time-signature
-    ///     references at every level a `MeterChange` can appear (a region's
-    ///     time-model meter changes, a region's default metric grid, a
-    ///     measure's declared time signature, a staff instance's local metric
-    ///     grid).
+    /// 10. Every graph reference resolves to an extant object, except where
+    ///     the re-anchoring rules explicitly permit transient dangling states
+    ///     during edits. This surface is **derived from the check bodies**, not
+    ///     copied from prose: `spec/CONTRACT_P13S26_INVARIANT10_SURFACE.md`
+    ///     pin 1 is the sole origin for both this list and `core_spec.tex`'s
+    ///     item 10, because the two were incomplete in different places and
+    ///     neither could be repaired from the other (P13-S26).
+    ///
+    ///   - Slur.start_event — live event.
+    ///   - Slur.end_event — live event.
+    ///   - Tie.start_event — live event.
+    ///   - Tie.end_event — live event.
+    ///   - Beam.events — live event.
+    ///   - SubBeam.events — live event.
+    ///   - Tuplet.members — live event.
+    ///   - Tuplet.parent — extant tuplet.
+    ///   - Spanner.staves — declared staff.
+    ///   - Spanner.start — anchor target.
+    ///   - Spanner.end — anchor target.
+    ///   - Marker.anchor — anchor target.
+    ///   - RepeatStructure.start — anchor target.
+    ///   - RepeatStructure.end — anchor target.
+    ///   - RepeatStructure.kind — anchor target.
+    ///   - RepeatStructure.voltas — anchor target.
+    ///   - ChordSymbol.anchor — anchor target.
+    ///   - AnalyticalAnnotation.anchor — anchor target, extant region, live event.
+    ///   - AnalyticalAnnotation.layer — declared analysis layer.
+    ///   - Comment.anchor — anchor target, extant region, live event.
+    ///   - GraphicGesture.objects — stored graphic object.
+    ///   - GraphicGesture.anchoring — anchor target, declared staff, live event.
+    ///   - LyricLine.events — live event.
+    ///   - Staff.instrument — declared instrument.
+    ///   - StaffInstance.instrument_override — declared instrument.
+    ///   - Staff.group — declared staff group.
+    ///   - StaffGroup.members — declared staff.
+    ///   - PartDefinition.staves — declared staff.
+    ///   - ViewDefinition.active_layers — declared analysis layer.
+    ///   - MetricTimeModel.meters — declared time signature.
+    ///   - StaffBasedContent.default_metric_grid — declared time signature.
+    ///   - Measure.time_signature — declared time signature.
+    ///   - StaffInstance.local_metric_grid — declared time signature.
+    ///   - NotatedComponent.tuplet — extant tuplet.
+    ///   - IndeterminacyHints.alternatives — live event.
+    ///   - TrajectoryEvent.start — live pitch.
+    ///   - TrajectoryEvent.end — live pitch.
+    ///   - GraphicEvent.graphics — stored graphic object.
+    ///   - CueEvent.source — live event.
+    ///   - TempoSegment.start — anchor target.
+    ///   - TempoSegment.end — anchor target.
+    ///
+    ///     Beyond that surface, further checks are reported under this same tag
+    ///     and are NOT part of the normative invariant 10: tempo-map segment
+    ///     shape, ordering and non-overlap (Chapter 3,
+    ///     `req:time:tempo-segment-order`); aleatoric ordering and bounds
+    ///     region locality (Chapter 3,
+    ///     `req:time:aleatoric-reference-locality`); and accidental
+    ///     modification expressibility (Chapter 4,
+    ///     `req:tuning:accidental-modification-compatibility`). That
+    ///     multiplexing is filed as P13-S29 — the public `check_invariant`
+    ///     filter and this violation's `Display` attribute those failures to
+    ///     invariant 10. Repairing it is a behaviour change, out of scope here.
@@ -4648 +4697,6 @@ mod g3a_tests {
-    fn t12_invariant_10_doc_comment_names_the_four_reference_classes() {
+    fn t12_invariant_10_doc_block_slices_and_is_non_empty() {
+        // Narrowed by P13-S26 pin 8. The exact (token, target) comparison lives
+        // in epiphany-testkit's `invariant_ten_surface` guard, which reads both
+        // this block and `core_spec.tex`. This one stays because
+        // `cargo test -p epiphany-core` must still fail when the block is
+        // destroyed, and testkit is a different crate.
@@ -4659,11 +4713,12 @@ mod g3a_tests {
-        for needle in [
-            "staff's group",
-            "group's members",
-            "part's staves",
-            "active layers",
-        ] {
-            assert!(
-                doc_block.contains(needle),
-                "invariant 10's doc comment must name `{needle}`; block was:\n{doc_block}"
-            );
-        }
+        let tokens: Vec<&str> = doc_block
+            .lines()
+            .filter_map(|line| line.trim_start().strip_prefix("/// "))
+            .filter_map(|rest| rest.trim_start().strip_prefix("- "))
+            .filter_map(|rest| rest.split_whitespace().next())
+            .collect();
+
+        assert!(
+            !tokens.is_empty(),
+            "invariant 10's doc block must list its reference surface, one \
+             `- Token — target.` line per class; block was:\n{doc_block}"
+        );

Forbidden-pattern scan over that diff's added and removed lines — InvariantViolation::new, fn check_, GraphInvariant:::

$ git diff --cached -U0 -- crates/epiphany-core/src/invariants.rs \
    | grep -E "^[+-]" | grep -v "^[+-][+-]" \
    | grep -E "InvariantViolation::new|fn check_|GraphInvariant::"
$ echo $?
1

No output; exit status 1. Every hunk falls inside the /// 10. doc block or inside mod g3a_tests. No check body was touched, no emission retagged.


§6. Two harness faults

Neither is a contract finding. Both are recorded because each halted the run under the owner's stop rule, and an unexplained halt reads as a suppressed mismatch.

(a) t12's module path. The harness expected invariants::tests::t12_…; the test lives in mod g3a_tests (invariants.rs:4668), so the real path is invariants::g3a_tests::t12_…. M4c's radius was correct on the first run — exactly test 2 and t12 failed — and only the expectation string was wrong.

(b) M12 applied partially, and it exposed a real weakness. The first M12 deleted the ordering referent from the requirement's normative clause and left the closing recap sentence, which still contains the word. Test 3 stayed green. M12 and M13 were re-applied as full referent deletions and both then fail as pinned.

Finding against pin 4a — reported, not patched. Pin 4a says test 3 buys that "neither referent … can silently leave". Measured, it buys less: a referent can leave the sentence carrying the normative force while surviving in prose that does not. Pin 4a's framing that test 3 is "weaker than tests 1 and 2, and stated as such" is correct; this specific claim overstates by one step. A pin change is its own amendment with its own review round, so the pin is untouched.


§7. Restoration

After all 38 mutations:

suites=43 passed=1586 failed=0 ignored=0
cargo +1.95.0 fmt -p epiphany-core -p epiphany-testkit --check: clean

Exactly the structural baseline of §1. Every restoration was a hand write-back of captured bytes; git checkout, git restore and git stash were never used against the working tree.


Amendment 3 evidence — test 3's clause scope

Appended, not merged. Everything above is the historical record of the rung's own execution and is unchanged, including its 38/38 matrix. This section records amendment 3 (7c8a30d), whose execution touches touch rows 4, 6, 7 and 8 only. spec/core_spec.tex is not modified: the requirement's text was always correct, and only the guard was weak.

A3.§1 What changed

Test 3 previously asserted phrase presence over the whole requirement block. It now selects the normative clause — the sentence carrying the sole \MUST{} — and runs all four assertions on that slice alone.

The selector, per amendment 3 §8.3: assert exactly one \MUST{} in the normalised block; start the clause after the last ". " at or before that occurrence, falling back to just after the \label{…} only when there is none; end after the first ". " at or after it.

A3.§2 Expected-versus-observed

M # Expected Observed Verdict
M22 1 aleatoric_reference_locality_states_both_referents_and_locality same MATCH
M23 1 aleatoric_reference_locality_states_both_referents_and_locality same MATCH
M24 1 aleatoric_reference_locality_states_both_referents_and_locality same MATCH
M25 1 aleatoric_reference_locality_states_both_referents_and_locality same MATCH
M26 1 aleatoric_reference_locality_states_both_referents_and_locality same MATCH
M27 1 aleatoric_reference_locality_states_both_referents_and_locality same MATCH

Six mutations, six matches, each with test 3 as its sole radius. No listed test passed unexpectedly; no unlisted test failed.

Each signs a different step, which is the point of there being six. M22 and M23 sign the referents' clause scope; M24 the locality phrase; M25 the last-period rule — it moves \MUST{} into a later sentence, and an implementation anchoring unconditionally after the label would return one slice from label to recap containing every needle, and pass; M26 the fallback anchor, via a period-free decoy that a correct fallback excludes and a block-start fallback includes; M27 the exactly-one assertion.

Each attacks a different layer, and this is the taxonomy the annex uses:

Mutation What it varies
M22, M23, M24 what the selected clause contains
M25 which sentence is selected
M26 the fallback boundary — starting after the label versus widening before it
M27 whether selection is unambiguous, and therefore permitted at all

One sentence in ratified §8 is inconsistent with that, and this annex does not repeat it. §8.4's M27 entry closes by saying M27 "varies which clause is chosen". It does not: M25 varies which clause is chosen, and a correct implementation rejects M27 before selecting any clause, on the exactly-one assertion. (§8.6 is unaffected — it says only that M27 was the step no mutation had reached, which is true.)

The sentence is frozen in a ratified section, so it is corrected through the amendment lifecycle, not silently rewritten. That correction is open as of this commit and is not part of it.

A3.§3 Mutation transcripts

M22

Mutation. ordering leaves the normative clause, survives in the recap

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (2099485) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:445:9:
req:time:aleatoric-reference-locality's normative clause must state "ordering"; the clause is the sentence carrying \MUST{}, and a phrase surviving elsewhere in the block does not count.
Clause was:
Every event used as a key in an aleatoric region's \texttt{bounds} map \MUST{} be an event of that same region.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M23

Mutation. bounds leaves the clause, survives in the recap

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (2101173) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:445:9:
req:time:aleatoric-reference-locality's normative clause must state "bounds"; the clause is the sentence carrying \MUST{}, and a phrase surviving elsewhere in the block does not count.
Clause was:
Every event referenced by an aleatoric region's \texttt{ordering} DAG \MUST{} be an event of that same region.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M24

Mutation. the locality phrase leaves the clause, appears in the recap

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (2102882) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:445:9:
req:time:aleatoric-reference-locality's normative clause must state "same region"; the clause is the sentence carrying \MUST{}, and a phrase surviving elsewhere in the block does not count.
Clause was:
Every event referenced by an aleatoric region's \texttt{ordering} DAG, and every event used as a key in its \texttt{bounds} map, \MUST{} be an event of that region.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M25

Mutation. \MUST{} moves to the recap, taking the clause with it

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (2104554) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:445:9:
req:time:aleatoric-reference-locality's normative clause must state "same region"; the clause is the sentence carrying \MUST{}, and a phrase surviving elsewhere in the block does not count.
Clause was:
Neither the ordering DAG nor the bounds map \MUST{} reach outside the region whose time model declares them.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M26

Mutation. M22's replacement plus a period-free ordering decoy before the label

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (2106230) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:445:9:
req:time:aleatoric-reference-locality's normative clause must state "ordering"; the clause is the sentence carrying \MUST{}, and a phrase surviving elsewhere in the block does not count.
Clause was:
Every event used as a key in an aleatoric region's \texttt{bounds} map \MUST{} be an event of that same region.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

M27

Mutation. the normative sentence unchanged; the recap gains a second \MUST{}

Complete --no-fail-fast failure set (full workspace, 1585 passed / 1 failed):

  aleatoric_reference_locality_states_both_referents_and_locality

Failing assertion, verbatim:

---- aleatoric_reference_locality_states_both_referents_and_locality stdout ----

thread 'aleatoric_reference_locality_states_both_referents_and_locality' (2107954) panicked at crates/epiphany-testkit/tests/invariant_ten_surface.rs:397:5:
assertion `left == right` failed: the requirement must carry exactly one \MUST{}; found 2. More than one leaves the normative clause ambiguous, and an implementation that silently took the first would scope every other assertion to whichever sentence happened to come first.
Block was:
\begin{requirement} \label{req:time:aleatoric-reference-locality} Every event referenced by an aleatoric region's \texttt{ordering} DAG, and every event used as a key in its \texttt{bounds} map, \MUST{} be an event of that same region. Naming an event that does not exist is a dangling reference, governed by graph invariant~10; naming an event that exists in a \emph{different} region is a distinct defect, and this requirement is what forbids it. Neither the ordering DAG nor the bounds map \MUST{} reach outside the region whose time model declares them.
  left: 2
 right: 1
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

A3.§4 Restoration

suites=43 passed=1586 failed=0 ignored=0

Unchanged from the rung's own structural baseline: amendment 3 alters an existing test's scope and adds none. Every restoration was a hand write-back of captured bytes.

A3.§5 The finding this closes

eddf6e9 recorded, in §6(b) above, that pin 4a claimed test 3 buys that "neither referent … can silently leave", and that measurement showed otherwise. That finding is now closed by strengthening the guard rather than softening the claim — pin 4a's sentence is true of the clause-scoped test. Pin 4a itself is frozen and unedited; amendment 3 is an additive override and governs from its ratification.