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gh-155322: Validate mutable structseq layout attributes - #155361
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BHUVANSH855 wants to merge 2 commits into
Open
gh-155322: Validate mutable structseq layout attributes#155361BHUVANSH855 wants to merge 2 commits into
BHUVANSH855 wants to merge 2 commits into
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Summary
Fix a crash in heap-allocated
PyStructSequencetypes when the writablen_fieldsattribute is modified from Python before constructing a new instance.The constructor now validates member access using the actual
tp_membersarray instead of relying on the mutablen_fieldsattribute, preventing out-of-bounds access that could lead to a segmentation fault.Adds a regression test covering the reported crash.
Closes issue gh-155322.