Merge train: #9570 #9571 (release gates re-enabled; honest #9552 fixture) - #9573
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September 2, 2026 22:21
…9565 The #9552 fix landed via merge train #9569 with the first draft of its gap test. That draft — `await fetch()` in a plain async function plus `gc()` — passed 6/6 on the UNFIXED runtime: the collection it forces does not free the in-flight promise, so the gate could not fail. This is the fixture validated on both arms: three consumer shapes (`.then`, async arrow, async class method) start a request from a frame that has returned, `Symbol()` churn trips the malloc-count sweep, `RegExp` headers reuse freed 80-byte slots. Unfixed it hangs 4/4 (two of the three promises freed by malloc sweeps, then a stale resolve on a reused slot); fixed it prints node's `ok,ok,ok 6` 5/5. Also lands the changelog fragment for #9565, which the train did not carry. Claude-Session: https://claude.ai/code/session_01Bok4V8wzgNGmBeE4GPf7Up
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Lands the validated train: #9570 (Promise.all preserves registration order when a pending input already has a reaction — #9377; native link-cache fixture measures one cache hit — #9378; both release gates re-enabled, ignore fragment deleted) and #9571 (the #9552 fixture strengthened to one that FAILS on the unfixed runtime — the train-landed draft passed 6/6 unfixed — plus #9565's changelog fragment).
Validation: release build green; RUST_TEST_THREADS=1 perry-runtime green; both re-enabled release-gate tests pass (1/1, 8/8); strengthened fixture byte-identical to node on the fixed tree; lint gates green.
Rebase-merge preserving authorship.