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Track A from the job NAME test-xtensa, not from its source. This job names a MECHANISM rather than a subject — the source it was fed (test/test_signal_default_revert_b336.pas) is what the mechanism was run ON, not what is being tested, so a lane guessed from it would be wrong by construction. The ranker reads frontmatter, so this line decides who works it; re-lane it if this job has changed what it covers.

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: test-xtensa#src:test/test_signal_default_revert_b336.pas at 370170edaffe in step 1/2, ./compiler/pascal26 --target=xtensa --platform=posix --x (auto-filed by twatch)

Repro

tools/testmgr.py --tier full --job 'test-xtensa#src:test/test_signal_default_revert_b336.pas' at 370170edaffea9713057a1bf65f9a616165d9685

Range

The named sha 370170edaffe 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 370170edaffe, last good 5d983997a05a, 2 commit(s) in range — the watcher narrows this by idle bisect; check tstate/TSTATE.md for the current range.

Log tail

pascal26:763: error: undefined variable (PAL_ERR_UNSUPPORTED)
pascal26:783: error: undefined variable (PAL_ERR_UNSUPPORTED)
(tail)
pascal26:763: error: undefined variable (PAL_ERR_UNSUPPORTED)
  in: /tmp/testmgr-scratch-1216987/compiler/../lib/rtl/platform/posix/platform_backend.pas
  near: Int64 ; begin Result := PAL_ERR_UNSUPPORTED >>> ; end ; 
pascal26:783: error: undefined variable (PAL_ERR_UNSUPPORTED)
  in: /tmp/testmgr-scratch-1216987/compiler/../lib/rtl/platform/posix/platform_backend.pas
  near: Integer ; begin Result := PAL_ERR_UNSUPPORTED >>> ; end ;

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

VERIFIED FIXED 2026-09-01 (frankC) — no longer reproduces at HEAD

Swept as part of "which of the 12 open auto-filed regressions still reproduce?". Re-ran this ticket's OWN job recipe at 2d9878ac8, compiler 6afb21f66d10 (built from the pin, self-host fixedpoint converged):

PXX_ALLOW_FULL_SUITE=1 tools/testmgr.py --tier full --job 'test-xtensa#src:test/test_signal_default_revert_b336.pas'

GREEN, twice. Run a second time deliberately: a single green run on a regression that may be intermittent proves nothing, and this test's population includes at least one known race. Two independent runs, both green.

Cause identified, not merely dated: db706c2da — the posix backend never declared PAL_ERR_UNSUPPORTED, which f9e495823's two new {$ifdef CPU_XTENSA} refuse-arms then referenced. That commit ADDS the constant to lib/rtl/platform/posix/platform_backend.pas:302, and it is an ancestor of HEAD, so the chain is causal rather than temporal. Both job steps pass: compile is clean and run_target.sh xtensa gives rc=143 as the recipe asserts. Independently confirmed by frankA, who reached the same conclusion from git log -S before we discovered we were sweeping the same folder.