Re-laned P -> A by the coordinator, 2026-08-30. The guess came from the test SOURCE (.pas -> Track P). The failing job is test-asm — the x86-64 assembler / disassembly emitter — which is Track A whatever language it is fed. test_asm_emit_x64 reports undefined variable (EmitSyscall) in compiler/x64enc.inc, and the only code commit touching that file in the range is 3a0ed43fb (--rtl-libc converts the mnemonic-emitted syscalls). Nothing here is Pascal-frontend work.

Master is NOT broken. Measured at HEAD by the coordinator: make compiler/pascal26 exits 0, converged after 2 round(s), fixedpoint a3f0f9e3325f. So this red is specific to the test-asm path, not a general build break — do not read it as one.

Track guessed as P from the test source. The ranker reads frontmatter, so this line — not the body — decides who works it; correct it if the guess is wrong.

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.

regression: test-asm#src:test/test_asm_emit_x64.pas red at 31198d3674df (auto-filed by twatch)

• Type: regression (auto-filed by Track T watcher, host seven). Untriaged.
• Found: 2026-08-30T05:08:12Z
• Test source: test/test_asm_emit_x64.pas tools/expect_same.sh

Repro

tools/testmgr.py --tier native --job 'test-asm#src:test/test_asm_emit_x64.pas' at 31198d3674dfe530aa0699f0eb775346a705410a

Range

The named sha 31198d3674df 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 31198d3674df, last good 7956dc38005e, 3 commit(s) in range — the watcher narrows this by idle bisect; check tstate/TSTATE.md for the current range.

Log tail

pascal26:193: error: undefined variable (EmitSyscall)
(tail)
pascal26:193: error: undefined variable (EmitSyscall)
  in: compiler/x64enc.inc
  near:    end else EmitSyscall >>>  end  

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

Log

• 2026-08-30 — auto-closed by the seven watcher: test-asm#src:test/test_asm_emit_x64.pas passes at 08cbfa20a11d (tier native); it was red at 31198d3674df. Reopening is by a fresh NEW-RED stub, since a second red is a second finding with its own range.

RESOLVED 2026-08-30 (frankA) — self-inflicted, fixed in 658f4bea5

Mine. 3a0ed43fb routed x64_syscall through EmitSyscall so --rtl-libc could reach the 17 mnemonic-spelled kernel entries. That worked for the compiler and broke every other consumer of the file: this harness includes compiler/x64enc.inc standalone, mocks the byte sink, and has no compiler policy — so EmitSyscall was undefined at x64enc.inc:193.

The defect was a layering inversion, not a missing declaration: a byte encoder had acquired an upward dependency on RtlOverLibc, OptLevel and the call-site table. Adding a mock EmitSyscall to the harness would have turned it green while leaving the encoder pointing the wrong way, so the next policy the lowering needs breaks it again.

Fixed with a hook the encoder owns — var X64SyscallHook: procedure = nil, where nil means "emit the two bytes". compiler.pas installs @EmitSyscall. No test file changed.

Verified: this harness compiles and runs green, default codegen byte-identical to a build of HEAD without the change, --rtl-libc unchanged (1 residual kernel entry, div0 rc=200, SIGTERM rc=143).

Note for the batch: three of the five test-asm reds filed alongside this one are NOT this defect — see regression-test-asm-test-asmcore-x64. twatch files per source, so one cause splits into several tickets; nothing stops two causes landing in one batch and reading as one.