[issue31356] Add context manager to temporarily disable GC

[Lisa Roach]

Lisa Roach <lisaroach14 at gmail.com> added the comment:

I gave it a shot- looks like we need to ensure that we catch any errors that could be thrown by the warning itself.

I wasn't entirely sure how to create a test for this, if anyone knows how I'll definitely add it!

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31356>
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