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[PR #6960] [CLOSED] fix(cancellation): preserve the caller abort reason at remaining checkpoints #7475
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opened 2026-11-01 21:48:07 +00:00 by bsakaguchi
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📋 Pull Request Information
Original PR: https://github.com/morluto/rea/pull/6960
Author: @viniciusdsandrade
Created: 10/24/2026
Status: ❌ Closed
Base:
main← Head:fix/6958-remaining-abort-reasons📝 Commits (2)
24b5e71fix(cancellation): preserve the caller abort reason at remaining checkpointsed37f98test(cancellation): assert the caller abort reason at refused checkpoints📊 Changes
7 files changed (+98 additions, -19 deletions)
View changed files
📝
src/application/android/AndroidPackageInspection.ts(+3 -1)📝
src/application/binary/BinarySession.ts(+26 -6)📝
src/application/native/NativeValueTrace.test.ts(+14 -0)📝
src/application/native/NativeValueTrace.ts(+5 -1)📝
src/server/registerSessionRecordTools.ts(+5 -1)📝
tests/boundary/mcp/androidPackageSummaryMcp.test.ts(+12 -8)📝
tests/composition/analysis-sessions/binarySession.test.ts(+33 -2)📄 Description
Summary
After #6143 and #6144, four producing checkpoints still built
AnalysisCancelledErrorfor an observed abort without the caller'ssignal.reasonas thecause: the binary session's transition wait and external-mutation guards, the native value trace loop checkpoint, the Android package inspection admission guard, and theimport_evidence_bundlecheckpoint after the bundle read. Each now passes the exact reason, as the neighbouring checkpoints in the same owners already do. Cancellation classification and cleanup behavior are unchanged.Fixes #6958
Problem and expected behavior
Smallest trigger: pass an
AbortSignalaborted with a non-undefined reason to one of the affected entry points, either already aborted or aborted while the operation waits. For the session,withAdmittedAnalysisreturns the transition wait result directly (src/application/binary/BinarySession.tsline 1143), so a session-backed MCP server refused a cancelled tool call without the reason while the fixed-analysis admission insrc/server/analysisAdmission.ts(lines 27 to 32) included it.Expected: the cancellation error's
causeis that exact reason. Observed before this change:cause === undefined. Violated invariant: a caller-supplied abort reason survives into the typed cancellation error.Change and scope
src/application/binary/BinarySession.ts:#waitForTransition(pre-aborted signal, abort listener, and a transition settling while aborted) and both guards inwithAdmittedExternalMutationpass the caller's reason. The shutdown-induced refusal in#targetAcquisitionRefusedhas no caller signal and is unchanged.src/application/native/NativeValueTrace.ts: the loop checkpoint passescause: signal.reason, matching the final checkpoint.src/application/android/AndroidPackageInspection.ts: the admission guard passescause: options.signal.reason.src/server/registerSessionRecordTools.ts: theimport_evidence_bundlecheckpoint after the bundle read passescause: signal.reason.Intentionally not included: cancellations caused by provider or session closure, which carry no caller signal; sites whose public boundary already rewraps the result with the caller's reason (for example
FlutterBuildProvider.execute); and any schema change. No complexity was added for a speculative race.Follow the contribution scope.
Unresolved scope, authority, side effects, or required verification block
integration. Link the required maintainer scope decision for new providers or
capabilities involving target execution, injection, mutation, or protection
recovery; ordinary fixes within existing boundaries may state "not applicable".
Draft PRs may leave the scope decision pending and the readiness and merge checklists
unchecked. Maintainers can help resolve open questions.
Contract and boundary impact
causeis now populated; whethercausereaches wire output was not examined.docs/public/product-catalog.json), package, or installation impact: none.Expected effects (check known effects; use documentation-only on its own).
Unchecked items do not establish absence; leave uncertainties visible.
No target interaction: the change affects only the construction of typed errors.
Evidence and regression coverage
tests/composition/analysis-sessions/binarySession.test.ts: the queued admission behind an in-flightopennow aborts with a reason and asserts the identicalcause; a new case covers a pre-aborted admission and a pre-aborted external mutation.src/application/native/NativeValueTrace.test.ts: "preserves the caller abort reason when the trace starts cancelled".tests/boundary/mcp/androidPackageSummaryMcp.test.ts: the existing pre-provider cancellation case aborts with a reason and asserts the identicalcause.toBeon the reason object. On the base revision each fails becausecauseisundefined.1d896e03b.import_evidence_bundlecheckpoint is reached only when the abort lands after the bundle read completes; no deterministic trigger exists at the MCP boundary, so that one-line change is established by reading. The existing cancellation test for that tool (tests/boundary/mcp/evidenceImportCancellation.test.ts) exercises the reader-owned path, which already carried the reason. Wire projection ofcausewas not examined.For evidence-bearing changes:
Not an evidence-bearing change.
Validation performed
Compatibility, safety, and release
Author readiness
Human owner: @viniciusdsandrade
Before merge
type(scope): outcome.🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.