[3.10] GH-102537: Handle check for PYTHONTZPATH failing in zoneinfo test (GH-102538) #102587
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It is possible but unlikely for the
python_tzpath_context
function to fail between the start of thetry
block and the point whereos.environ.get
succeeds, in which caseold_env
will be undefined. In this case, we want to take no action.Practically speaking this will really only happen in an error condition anyway, so it doesn't really matter, but we should probably do it right anyway.
(cherry picked from commit 64bde50)
Co-authored-by: Paul Ganssle 1377457+pganssle@users.noreply.github.com