[issue45582] Rewrite getpath.c in Python

[Steve Dower]

Steve Dower <steve.dower at python.org> added the comment:

It's done! Those were some of the hardest memory leaks I've had to track down, but it should be clear now.

As I mentioned in the commit message, this change attempts to preserve every known quirk. However, I think these ought to be streamlined across platforms to improve the code and/or startup performance.

But at least we know now that any changes in the future that require test changes are expected, and not the result of this change :)

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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<https://bugs.python.org/issue45582>
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