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Track T by default: the FAILING STEP named no owner. Line 2 of 2 is tools/expect_same.sh cmath_nan_payload "$(/tmp/cmath_nan_payload)" "$(printf 'empty 7FF8000000000000\n1 7FF8000000000001. The job's own src (test/cmath_nan_payload.c, 2 file(s)) is NOT used here on purpose: it is what the job compiles, not what broke, and guessing a lane from it is what sent three reds in one job to the wrong lane. This is a FALLBACK, not a finding — nothing says the defect is Track T's. Re-lane it before working it.

This commit CANNOT be the cause. The job builds only with $(PXX_STABLE), and this commit moved no stable_linux_amd64/** — so the bytes that compiled it are unchanged. Look at flakiness or box load, not at the named sha; the bisect is unsound here and has been skipped.

origin/master has advanced 6 commit(s) since this sha. Re-verify at current HEAD before acting — the callback is tagged to the sha that was tested, which may no longer be the state of the tree.

regression: lib-test#src:test/cmath_nan_payload.c at 2749b12c2e93 in step 2/2, tools/expect_same.sh cmath_nan_payload "$(/tmp/cmath_nan_payload)" "$(printf 'empty 7FF8000000000000\n1 7FF800000000000… (auto-filed by twatch)

Repro

tools/testmgr.py --tier full --job 'lib-test#src:test/cmath_nan_payload.c' at 2749b12c2e93b397f6e384a6c05176831c9378fa

Range

The named sha 2749b12c2e93 CANNOT be the cause — it touches no buildable file (docs / tickets / tstate only). It is the sha that was TESTED, i.e. the upper bound of an untested range; the cause is somewhere below it.

bad 2749b12c2e93, last good 08b0f50df2ac, 1 observable commit(s) in range (it builds with $(PXX_STABLE), so compiler/ commits cannot have caused it and are dropped; pin moves, lib/ and test/ are kept) — the watcher narrows this by idle bisect.

Log tail

Segmentation fault (core dumped)
(tail)
ok: /tmp/testmgr-scratch-2058534/cmath_nan_payload  [code=405272B  data=13264B  bss=73344B  procs=936]
Segmentation fault (core dumped)
expect_same: MISMATCH [cmath_nan_payload]
--- expected
+++ actual
@@ -1,7 +1 @@
-empty      7FF8000000000000
-1          7FF8000000000001
-12345      7FF8000000003039
-0x10       7FF8000000000010
-abc        7FF8000000000000
-077        7FF800000000003F
-big        7FF8000000000001
+

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

Log