ceval.c: missing PyErr_NoMemory + PyEval_GetLocals NULL

[aisk]

Bug report

Bug description:

Original gist: https://gist.githubusercontent.com/devdanzin/55ed5cf0d452eb6ce881e7a8fad30ddb/raw/aec57efe5d45a6995757b60970173d5dca92f188/ceval_stackref_oom.md

ceval.c: Missing PyErr_NoMemory in _PyObjectArray_FromStackRefArray + PyEval_GetLocals NULL deref

Summary

1. _PyObjectArray_FromStackRefArray (line 1112): PyMem_Malloc returns NULL without exception. Affects ~10 vectorcall functions → SystemError.
2. PyEval_GetLocals (line 2622): _PyFrame_GetFrameObject can return NULL, immediately dereferenced → segfault.

Fix

1. Add PyErr_NoMemory() after PyMem_Malloc failure.
2. Add NULL check after _PyFrame_GetFrameObject.

But the second _PyFrame_GetFrameObject issue is already resolved by #146124

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-153205: Set MemoryError in stackref array conversion #153206