regression: test-sqlite-threads-x86_64#00 red at 83006e927e35 (auto-filed by twatch)

• Type: regression (auto-filed by Track T watcher, host borg). Untriaged.
• Found: 2026-07-12T04:27:56Z
• Test source: tools/run_sqlite_thread_test.sh

Repro

tools/testmgr.py --tier full --job 'test-sqlite-threads-x86_64#00' at 83006e927e35b02e76728c3a292e08dbcc0b792e

Range

bad 83006e927e35, last good 83006e927e35, 0 commit(s) in range — the watcher narrows this by idle bisect; check tstate/TSTATE.md for the current range.

Log tail

test-sqlite-threads: building threadsafe sqlite (x86_64) ...
ok: /tmp/csqlite_thread_test26_x86_64  [code=3198218B  data=42176B  bss=50532B  procs=4149]
test-sqlite-threads: FAIL x86_64 (not libc-free — has DT_NEEDED)

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

Triage (Track T, 2026-07-12)

Two causes, both resolved.

1. The original red at 83006e927e35 was the same transient window as regression-test-core-131: a copysign workaround left crtl calling out to libc math, so zlib failed to compile (call to undeclared function: copysign) and the sqlite binaries linked libc (not libc-free — has DT_NEEDED). Fixed by 796f4585 (real bit-level copysign/isinf/nextafter bodies, workarounds reverted); tstate recorded all five jobs FIXED at 3db9cbaad744 (5064b292).

2. The later aarch64/arm32 flaps (RED at e15a3705/15f50987, GREEN again right after) were a cross-checkout race, not the compiler: run_sqlite_thread_test.sh built into a fixed /tmp/csqlite_thread_test26_$ARCH shared by every checkout on the box, so a concurrent run's binary could be the one readelf'd. Fixed in fe462098 (private mktemp -d under TESTMGR_TMP).

GREEN at HEAD per tstate (full through 3f5aa914cac5).

• 2026-07-12 — resolved, commit fe462098.