gh-114570: Add PythonFinalizationError exception by vstinner · Pull Request #115352 · python/cpython (original) (raw)

Add PythonFinalizationError exception. This exception derived from RuntimeError is raised when an operation is blocked during the Python finalization.

The following functions now raise PythonFinalizationError, instead of RuntimeError:

• _thread.start_new_thread()
• subprocess.Popen
• os.fork()
• os.fork1()
• os.forkpty()

Morever, _winapi.Overlapped finalizer now logs an unraisable PythonFinalizationError, instead of an unraisable RuntimeError.

• Issue: Checking for sys.is_finalizing before thread.start() still yields "can't create new thread at interpreter shutdown" #114570

📚 Documentation preview 📚: https://cpython-previews--115352.org.readthedocs.build/