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regression: test-core#src:examples/tk/callbacks.npy red at 410b7a40b516 (auto-filed by twatch)

• Type: regression (auto-filed by Track T watcher, host plexus). Untriaged.
• Found: 2026-08-13T22:48:49Z
• Test source: examples/tk/callbacks.npy test/test_nilpy_kwargs_by_name.npy

Repro

tools/testmgr.py --tier native --job 'test-core#src:examples/tk/callbacks.npy' at 410b7a40b51663a8e3c404fe214d2ce8e5a6bd79

Range

bad 410b7a40b516, last good 77c55970f49c, 2 commit(s) in range — the watcher narrows this by idle bisect; check tstate/TSTATE.md for the current range.

Log tail

pascal26:50: error: undefined variable (print)
(tail)
pascal26:50: error: undefined variable (print)
  near: lambda first  last  print >>>  lambda scroll ok  

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

• 2026-08-14 — resolved, commit ff612f583.