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gh-134381: Fix RuntimeError when starting not-yet started Thread after fork (gh-134514)

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Jiucheng(Oliver) 2025-05-23 15:22:14 -04:00 • committed by GitHub
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commit 9a2346df86
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6
Modules/_threadmodule.c
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@ -296,6 +296,12 @@ _PyThread_AfterFork(struct _pythread_runtime_state *state)
continue;
}
// Keep handles for threads that have not been started yet. They are
// safe to start in the child process.
if (handle->state == THREAD_HANDLE_NOT_STARTED) {
continue;
}
// Mark all threads as done. Any attempts to join or detach the
// underlying OS thread (if any) could crash. We are the only thread;
// it's safe to set this non-atomically.