[3.7] bpo-35633: test_lockf() fails with "PermissionError: [Errno 13] Permission denied" on AIX (GH-11424) #11858
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bpo-35633: Fix a test regression introduced with bpo-35189 (PEP 475: fnctl functions are not retried if interrupted (EINTR)).
Not only a blocking IO error needs to be ignored - permission errors also need to be ignored.
p.s. - iirc as a "test" only correction a NEWS item is not required. If this is not correct - just mention, and I'll add a NEWS blurb.
https://bugs.python.org/issue35633
(cherry picked from commit b94d4be)
Co-authored-by: Michael Felt [email protected]