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fix(search,minimize): validate replay outcomes and allow deadlocked invariant minimization - #51
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…nvariant minimization - TraceReplayer now executes each step and verifies that the actual StepOutcome matches the recorded trace outcome, failing fast with CorruptedTraceException on divergence. - DeltaDebugger.isStillFailing evaluates invariant violations directly when an invariant is present, allowing counterexamples in deadlocked configurations to be minimized. - Add test coverage in TraceReplayerTest and DeltaDebuggerTest. Co-authored-by: Codex <noreply@openai.com>
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📝 Summary
Merge Risk: ⚪ Minimal · up to Replay now fails fast when a recorded outcome disagrees with the executed step, and minimization now handles invariant violations in deadlocked configurations. No concrete merge-blocking risk was found. Pre-merge checks |
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 5 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
✅ Passed checks (4 passed)
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Check name Status Explanation Title check The title clearly summarizes both primary changes: replay outcome validation and deadlocked invariant minimization. Description check The description directly explains the replay validation and deadlocked invariant minimization changes, and it includes relevant verification details. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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Description
This PR addresses PR 1 from the approved remediation plan:
TraceReplayer): Replay execution now checks that each step execution outcome matches the outcome recorded in the trace. On divergence, it fails fast by throwing a newly introducedCorruptedTraceExceptioninstead of silently stepping into inconsistent states.DeltaDebugger):isStillFailingnow evaluates invariant violations directly when an invariant is present, removing the restrictive!config.isDeadlockCandidate()check. Invariant violations occurring in deadlocked terminal configurations are now properly recognized and can be minimized byddmin.Verification
TraceReplayerTest: verified outcome verification and fail-fastCorruptedTraceExceptionbehavior on mismatch.DeltaDebuggerTest: verified minimization of an invariant violation in a deadlocked terminal configuration../gradlew test: 529 tests pass../gradlew check: clean build and verification../gradlew javadoc: passes with strict doclint (-Werror)../gradlew --max-workers=1 -PpitestThreads=1 pitest: mutation ratchet passes at 255/268 (95.15%) >= 94%.