Improve the error reporting for inc_ref GIL failures #4427
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@Skylion007 @henryiii I know this sucks, but I think you might want to push this out ASAP given all the issues with 2.10.2 Might be worth rereleasing 2.10.2 with this patch or pushing out 2.10.3 |
Skylion007
reviewed
Dec 27, 2022
Skylion007
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Dec 27, 2022
rwgk
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Dec 27, 2022
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I don't remember seeing the pypy-3.7 • windows-2022 • x64 CI failure. Rerunning to be sure it's a flake. |
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I believe all of the comments are now resolved. Thanks for the feedback and reviews! |
rwgk
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Dec 28, 2022
rwgk
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Dec 29, 2022
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Could someone else please merge this? (@henryiii or @Skylion007) |
henryiii
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Dec 30, 2022
rwgk
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…pointer. Context: * pybind/pybind11#4427 (comment) > I don't think your logic ... is actually correct? I don't think it would handle metaclasses right. PiperOrigin-RevId: 498690703
henryiii
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Jan 2, 2023
* First * Fixs * Improve * Additional assertions comment * Improve docs
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Description
In 2.10.2, we added a new feature to catch UB when inc_ref or dec_ref are called without the GIL. This functionality works great, but the error reporting via an exception is very suboptimal as those exceptions get called in weird environments, triggering weird crashes.
This PR adds some good old-fashioned fprintf statements to help users understand what is going on. I want to use fprintf here because that's generally the most reliable method in all sorts of environments (especially when iostream might not be initialized properly).
Closes #4426
Suggested changelog entry: