Missing error checks in `_PyEval_MatchClass` · Issue #110237 · python/cpython · GitHub

Several places in _PyEval_MatchClass call PyList_Append without checking the return value (e.g., https://github.com/python/cpython/blob/fc2cb86d210555d509debaeefd370d5331cd9d93/Python/ceval.c#L509C13-L509C26). However, PyList_Append can fail. It will only fail if we're out of memory or if we passed a non-list, so it's unlikely to come up in practice, but we should still check for errors.

cc @brandtbucher for pattern matching

gh-110237: Check `PyList_Append` for errors in `_PyEval_MatchClass` (#…

pythongh-110237: Check `PyList_Append` for errors in `_PyEval_MatchCl…

[3.11] gh-110237: Check `PyList_Append` for errors in `_PyEval_MatchC…

[3.12] gh-110237: Check `PyList_Append` for errors in `_PyEval_MatchC…

pythongh-110237: Check `PyList_Append` for errors in `_PyEval_MatchCl…

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