Bug report

Bug description:

whence+1 could lead to overflow for large value ofwhence. I thinkchanging type fromint toPy_ssize_t could fix the problem (remain isinput parameter):

staticintpmerge(PyObject*acc,PyObject**to_merge,Py_ssize_tto_merge_size){...remain=PyMem_New(Py_ssize_t,to_merge_size);

CPython versions tested on:

3.11

Operating systems tested on:

Linux

Linked PRs

• gh-126862: UsePy_ssize_t instead ofint when processing the number of super-classes #127523
• [3.13] gh-126862: UsePy_ssize_t instead ofint when processing the number of super-classes (GH-127523) #128699
• [3.12] gh-126862: UsePy_ssize_t instead ofint when processing the number of super-classes (GH-127523) #128700