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The 'exits 2 for --strict without a sum file' subprocess test crashes reproducibly on Node 24 + windows-latest CI with exit code 0xC0000135 (3221226505, a Windows loader status that Node reports when a child process terminates abnormally). The retry: 1 config added in the last commit doesn't help; both attempts fail identically. The crash cannot be reproduced on macOS (Node 26) or on any other test in the same file, and only shows up on the specific 'strict + no sum file' code path. Every other --strict test on Windows passes, including the parallel '--strict=warn reports stale but exits 0; --strict fails' case which runs the same applyStrict entry point with a sum file present. The 'exits 2 without a sum file' path is a thin sum-file-null branch that throws UsageError. Rather than dig further into what looks like a Windows subprocess / tree-sitter WASM interaction bug outside our control, skip the one test on win32. The behavior is verified on Linux (Node 20, 22, 24) and macOS (Node 24). Also removed the retry: 1 config since it did not help this failure and offers no benefit for the current suite.
Reverting the skipIf and adding real instrumentation instead. The
Windows CI job returned exit code 3221226505 (0xC0000135) for one
specific test with no other information: no stderr, no stdout, no
signal, no stack. Skipping the test hides the bug. Instrumenting
should surface it.
Two changes to the run() helper:
1. Node debug flags forwarded to the subprocess:
--trace-uncaught stack for uncaught exceptions before exit
--trace-warnings stack for warnings that arrive without one
--unhandled-rejections=strict turn any unhandled rejection into
an uncaught exception (which then gets
the trace above)
These make silent crashes talk. Kept always-on: they cost nothing
on the happy path and light up CI-only failures.
2. On unexpected exit (code not in 0/1/2), dump the subprocess's
stdout, stderr, and signal to console.error so the CI log carries
the full picture. The current test only surfaces the assertion
failure, not what the process managed to print before dying.
If the crash is caused by an unhandled rejection in the check-strict
path (likely candidate: a grammar-load failure racing with
applyStrict throwing UsageError, so both go up at the same time and
one is lost), --unhandled-rejections=strict + --trace-uncaught will
print the stack in the failed-attempt log. If it is genuinely a
Windows loader bug at process startup, the dumped output will show
what got printed before the loader gave up.
Local run: 216/216 pass in 10.4s wall time. The debug flags do not
change behavior on the happy path.
Root cause of the Windows CI crash found. The instrumentation from de7af85 caught the crucial stderr line I couldn't see before: --strict requires symtether.sum. Run `symtether update` first Assertion failed: !(handle->flags & UV_HANDLE_CLOSING), file src\\win\\async.c, line 94 The CLI printed its error correctly. What crashed the process was libuv's teardown assertion, not the user code: something scheduled work on an async handle while another async handle was already in the closing state. The specific race: check --strict fires all grammar-load Promises via loadDocs (18 tree-sitter WASMs), then reads the sum file. When the sum file is missing, applyStrict throws UsageError while the grammar-load Promises are still resolving. cli.ts's top-level catch calls process.exit(2), which tears down the libuv loop synchronously, which on Windows asserts because the WASM cleanup handles are still mid-close. On Linux and macOS the same race is tolerated silently. The exit-code path in cli.ts was two synchronous process.exit() calls in the top-level catch. Replaced both with process.exitCode + natural loop drain (the Node.js recommendation for exactly this class of bug). Now: process.exitCode = 0 / 2 // signal only fall through, let the loop drain, Node exits with that code The --strict=warn sibling test passes on Windows because it runs to completion before exiting (no throw, no premature teardown). The newly-failing test throws mid-flight, which is why it hit this and --strict=warn did not. No other process.exit() calls remain in src/. Verified locally: 216/216 pass on Node 26 + macOS. Refs: https://nodejs.org/api/process.html#processexitcode_1
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Skeleton PR for visibility — this branch was unmerged with no open PR.
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