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Track T by default: the FAILING STEP named no owner. Line 2 of 2 is tools/expect_same.sh cmath_no_pascal_hijack "$(/tmp/cmath_no_pascal_hijack)" "$(printf 'pow=1024 1.41421\nlog=1.38629436. The job's own src (test/cmath_no_pascal_hijack.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_no_pascal_hijack.c at 2749b12c2e93 in step 2/2, tools/expect_same.sh cmath_no_pascal_hijack "$(/tmp/cmath_no_pascal_hijack)" "$(printf 'pow=1024 1.41421\nlog=1.3862943… (auto-filed by twatch)

Repro

tools/testmgr.py --tier full --job 'lib-test#src:test/cmath_no_pascal_hijack.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

ok: /tmp/testmgr-scratch-2058534/cmath_no_pascal_hijack  [code=405272B  data=13448B  bss=73344B  procs=935]
expect_same: MISMATCH [cmath_no_pascal_hijack]
--- expected
+++ actual
@@ -1,10 +1,10 @@
-pow=1024 1.41421
-log=1.386294361 log10=3.000000000 log2=3.000000000
-exp=2.718281828
-atan2=0.785398163 0.463647609 1.107148718
-copysign=-3 3
-isnan=1 0
-isinf=1 0
-nan=1 1
-hypot=5.000000000 fmod=1
-sqrt=1.414213562 ceil=-2 floor=-3
+pow=2.27899e-317 -0
+log=0.000000000 log10=0.000000000 log2=0.000000000
+exp=0.000000000
+atan2=0.000000000 0.000000000 0.000000000
+copysign=2.27909e-317 2.07508e-322
+isnan=18019 0
+isinf=18019 0
+nan=18020 0
+hypot=0.000000000 fmod=5.92879e-323
+sqrt=0.000000000 ceil=-0 floor=0

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

Log