Use try_lock in py_os_after_fork_child by youknowone · Pull Request #7178 · RustPython/RustPython

after_forkers_child.lock() can deadlock in the forked child
if another thread held the mutex at the time of fork.
Use try_lock and skip at-fork callbacks when the lock is
unavailable, matching the pattern used in after_fork_child
for thread_handles.

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after_forkers_child.lock() can deadlock in the forked child
if another thread held the mutex at the time of fork.
Use try_lock and skip at-fork callbacks when the lock is
unavailable, matching the pattern used in after_fork_child
for thread_handles.