regression: test-aarch64#src:test/test_asyncecho.pas red at 88986014e07d (auto-filed by twatch)

Resolution (2026-07-17)

Not a code regression — a harness flake. The RED at 88986014 (a commit touching only tools/pasmith.py + fuzz LEDGER.json, structurally incapable of affecting an aarch64 async test) was a transient QEMU/socket-timing flake: the test COMPILED (ok: in the log tail) and failed at run, 0-in-range. Verified flaky — 3/3 PASS on manual re-run at the time, GREEN again now.

Fixed at the harness level by [[bug-t-flaky-async-multithreaded-tests-false-newred]] (4c96b227): reap() now confirm-retries a failed run-test in the runtime-nondeterministic classes (qemu/corpus/conformance/opt) before declaring RED, and reports flaky when it recovers. This transient can no longer produce a false NEW-RED. No compiler change was needed or made.

• Type: regression (auto-filed by Track T watcher, host borg). Untriaged.
• Found: 2026-07-17T16:11:14Z
• Test source: test/test_asyncecho.pas tools/run_target.sh

Repro

tools/testmgr.py --tier full --job 'test-aarch64#src:test/test_asyncecho.pas' at 88986014e07d32db61be699184456df72ecc1a16

Range

bad 88986014e07d, last good 88986014e07d, 0 commit(s) in range — the watcher narrows this by idle bisect; check tstate/TSTATE.md for the current range.

Log tail

ok: /tmp/testmgr-scratch-3146132/test_aarch64_asyncecho  [code=196180B  data=1528B  bss=47276B  procs=304]

Stub ticket: signal only. Track T agent (face 2) enriches or a dev track takes it from the repro line.

• 2026-07-17 — resolved, commit 4c96b227.