fix garbage collection in inheritance cases #4563
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This was referenced Sep 17, 2024
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Aside from benchmarks CI failure (which is solved separately in #4591) I think this is now ready for merge. Does anyone want to review before I do so? I'm keen to merge and get on with back porting this for 0.22.4. |
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Will proceed with merge (and backporting) 🙈 |
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Ok will get #4599 merged and backported first. |
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* fix garbage collection in inheritance cases * clippy fixes * more clippy fixups * newsfragment * use `get_slot` helper for reading slots * fixup abi3 case * fix new `to_object` deprecation warnings * fix MSRV build
davidhewitt
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Oct 12, 2024
* fix garbage collection in inheritance cases * clippy fixes * more clippy fixups * newsfragment * use `get_slot` helper for reading slots * fixup abi3 case * fix new `to_object` deprecation warnings * fix MSRV build
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After looking at GC code recently in #4479 I had a nagging feeling that inheritance might also be a problem with
__traverse__.I finally had some time to follow up on that thought today, and it turns out that indeed in cases of
#[pyclass(extends = ...)]then we are currently not traversing the base class (or calling its'__clear__function).This PR fixes that, by modifying the generated code for both
__traverse__and__clear__to call the base type's function.Both of the new tests currently fail on
main. I think this probably should be patched as 0.22.4, as this is just a straight-up memory leak for all inheritance cases otherwise :(