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Queue-flake anchor: scripts/dropped-refinements.test.ts #29530

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Description

@github-actions

scripts/dropped-refinements.test.ts has ejected 10 pull requests from the merge
queue within a rolling 24 hours — 1 independent hit once
GitHub's speculative stacking is accounted for. This issue is the single place for
that conversation; it is refreshed by the merge-queue-triage workflow on every
further ejection.

PR stack queue build
#29437 S1 · root 41495583355 · 41491875177 · 41491559206
#29454 S1 · inherited 41495598866 · 41494560578
#29464 S1 · inherited 41498966913
#29495 S1 · inherited 41498375728 · 41495260722
#29505 S1 · inherited 41495587695 · 41491992528
#29511 S1 · inherited 41495591770 · 41493209726
#29514 S1 · inherited 41495594461 · 41494474291
#29515 S1 · inherited 41498313013 · 41495019103
#29519 S1 · inherited 41499208591
#29525 S1 · inherited 41498916863

⚠️ Queue depth is not evidence. The stack column is read out of the queue
branch names: GitHub builds each queued PR on top of the previous entry, so a
build whose BASE chain reaches another victim's queue HEAD (directly, or through
green groups queued between them) contains that victim's tree by construction.
A single deterministic break therefore ejects every PR
behind it, and the raw victim count climbs with QUEUE DEPTH until the owner
lands a fix. Start with the root above; an inherited row is a bystander until shown otherwise.

This issue is a NAME, not a diagnosis. The workflow that files it reads the
failing test file path out of the job logs and counts PRs; it does not
know whether this is a flake, a load/timing cliff, a semantic conflict between
queued PRs, or a real regression, and it does not act on any of those. No test is
skipped, quarantined or re-queued by it, and no PR is labelled by it — weakening
a gate stays a human act.

What to do with it: read one victim PR's triage comment for the failure REASON
line beside the FAIL line (a timeout and an assertion are the same FAIL line and
opposite diagnoses), decide the cause, and close this issue with the fix or with
the reason it is not one.

A later queue build that went green on the same main is a control only if its
affected-only selection ran the failing package; a green group that never selected
it carried the same tree without testing it.

Last refreshed by queue build 41498966913 (PR #29464).


Filed by the merge-queue-triage workflow (#4859, aggregation #10128).

Activity

  1. objectstack-fleet commented on Nov 2, 2026

    @objectstack-fleet
    Contributor

    triage#1 · os-zhuang · session_01AavokzJ5DndAwitDXvKy4U

    Path: none

    Triage: p1 · domain:spec · pm:queue · not a flake · 2026-11-02T18:15Z

    ⛔ Not a claim.


    Generated by Claude Code

  2. objectstack-fleet commented on Nov 2, 2026

    @objectstack-fleet
    Contributor

    domain:spec#5 · os-warren · session_01JQwxbWR3K3h7i1ytwycVg1

    Closing: the cause is fixed and the queue has been green since · 2026-11-02T23:27Z

    Path: none (the seat closes the anchor; no card thread, no PR)

    Reading Value
    Cause (triage 6584757277) not a flake: two queued PRs each regenerated the dropped-refinements ledger against different bases, so the merged tree's header read 998 against a body of 993
    Root #29437, merged 2026-11-02T20:11Z after merging origin/main and regenerating before it re-entered the queue (landing-operations.md §D)
    Last ejection under this signature queue build 41499208591, created 2026-11-02T18:17Z. This anchor was last refreshed 2026-11-02T18:43Z
    Since then all 19 completed merge_group CI runs created after 2026-11-02T18:45Z concluded success (one was still running at read time)

    Closing as completed, with the fix named above. The class can come back whenever two PRs that regenerate the same counts ledger share one queue window. The remedy stays the §D serial relay, and the workflow reopens the conversation on the next ejection. pm:queue is removed in the same step; domain:spec and priority:p1 stay.

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