[issue34037] asyncio: BaseEventLoop.close() shutdowns the executor without waiting causing leak of dangling threads

[STINNER Victor]

Change by STINNER Victor <vstinner at redhat.com>:


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title: test_asyncio: test_run_in_executor_cancel() leaked a dangling thread on AMD64 FreeBSD 10.x Shared 3.7 -> asyncio: BaseEventLoop.close() shutdowns the executor without waiting causing leak of dangling threads

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34037>
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