Track A from the job NAME test-emit-obj, not from its source. This job names a MECHANISM rather than a subject — the source it was fed (test/c_reaches_crtl_on_the_esp_idf_profile.c) 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 5 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.

first-ever red: test-emit-obj#shard0/6 at 0a101662f25f in step 1/33, ./compiler/pascal26 --target=xtensa --emit-obj test/c_reaches_crtl_on_the_esp_idf_profile.c /tmp/c_crtl_xt.o --shard 0/6 (auto-filed by twatch)

• Type: regression (auto-filed by Track T watcher, host borg, twatch f35167cd4e55). Untriaged.
• Found: 2026-09-24T09:41:29Z
• Test source: test/c_reaches_crtl_on_the_esp_idf_profile.c tools/run_c_conformance_esp.sh
• Failing step: line 1 of 33 of the job's recipe; it names test/c_reaches_crtl_on_the_esp_idf_profile.c.

  ./compiler/pascal26 --target=xtensa --emit-obj test/c_reaches_crtl_on_the_esp_idf_profile.c /tmp/c_crtl_xt.o --shard 0/6
  
  

Repro

tools/testmgr.py --tier full --job 'test-emit-obj#shard0/6' at 0a101662f25f2db6213234e9f56b3f16095a71b5

Range

The named sha 0a101662f25f 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 0a101662f25f, and this is the job's first-ever run — there is no earlier passing sha, so no interval contains the cause and every commit a range could name is equally innocent. No idle bisect will happen; a red here is a finding about the job, not a regression from the commits around it.

Log tail

too many arguments: pxx takes ONE source and ONE output
  source: test/c_reaches_crtl_on_the_esp_idf_profile.c
  output: /tmp/testmgr-scratch-958888/c_crtl_xt.o
  IGNORED: --shard
  IGNORED: 0/6
  flags go BEFORE the source: pxx [options] <source> [output]

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

Log

• 2026-09-24 — auto-closed by the borg watcher: test-emit-obj#shard0/6 no longer exists as a job at 2bf0ce324673 (renamed, removed, or a selector shift), so nothing can report it. It was red at 0a101662f25f; the close records disappearance, not a fix. Reopening is by a fresh NEW-RED stub, since a second red is a second finding with its own range.