[issue38780] SysLogHandler crash atexit

[Erlend Egeberg Aasland]

Erlend Egeberg Aasland <erlend.aasland at innova.no> added the comment:

Attached patch is based on Ronald Oussoren's and Alan Robertson's comments: Initialise self.socket to None early in __init()__, and then check for None in close() and emit(). Passes make test on 3.9, 3.8 and 3.7.

If this solution is ok I'll add a unit test for the case that triggered this report and prepare a PR.

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keywords: +patch
nosy: +erlendaasland
Added file: https://bugs.python.org/file48932/0001-bpo-38780-Harden-socket-use-in-logging.handlers.patch

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