mirror of https://github.com/python/cpython
GH-96827: Don't touch closed loops from executor threads (#96837)
* When chaining futures, skip callback if loop closed. * When shutting down an executor, don't wake a closed loop.
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@ -588,9 +588,11 @@ class BaseEventLoop(events.AbstractEventLoop):
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def _do_shutdown(self, future):
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try:
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self._default_executor.shutdown(wait=True)
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self.call_soon_threadsafe(future.set_result, None)
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if not self.is_closed():
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self.call_soon_threadsafe(future.set_result, None)
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except Exception as ex:
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self.call_soon_threadsafe(future.set_exception, ex)
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if not self.is_closed():
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self.call_soon_threadsafe(future.set_exception, ex)
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def _check_running(self):
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if self.is_running():
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@ -404,6 +404,8 @@ def _chain_future(source, destination):
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if dest_loop is None or dest_loop is source_loop:
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_set_state(destination, source)
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else:
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if dest_loop.is_closed():
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return
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dest_loop.call_soon_threadsafe(_set_state, destination, source)
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destination.add_done_callback(_call_check_cancel)
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@ -0,0 +1 @@
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Avoid spurious tracebacks from :mod:`asyncio` when default executor cleanup is delayed until after the event loop is closed (e.g. as the result of a keyboard interrupt).
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