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gh-91880: add try/except around signal.signal (#91881)

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Fixes gh-91880.
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David Hewitt 2022-04-25 16:56:20 +01:00 • committed by GitHub
parent 54d068adfb
commit 1cd8c29dac
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2 changed files with 26 additions and 1 deletions
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8
Lib/asyncio/runners.py
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@ -100,7 +100,13 @@ class Runner:
and signal.getsignal(signal.SIGINT) is signal.default_int_handler
):
sigint_handler = functools.partial(self._on_sigint, main_task=task)
signal.signal(signal.SIGINT, sigint_handler)
try:
signal.signal(signal.SIGINT, sigint_handler)
except ValueError:
# `signal.signal` may throw if `threading.main_thread` does
# not support signals (e.g. embedded interpreter with signals
# not registered - see gh-91880)
signal_handler = None
else:
sigint_handler = None