gh-144128: Fix crash in array.fromlist with reentrant __index__ #144138
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@serhiy-storchaka I have proposed a fix to make array.fromlist() safe against reentrant |
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This change fixes a crash in
array.fromlist()that can happen if an element’s__index__method mutates the input list while it is being processed.Previously,
array.fromlist()assumed the list would remain unchanged during conversion. If__index__cleared the list, the element being converted could be freed while still in use, leading to a crash. The implementation now keeps the element alive for the duration of the conversion, I have added a regression test to cover this case.