Bug report

Bug description:

Exception unwinding can sometimes push an integer to the stack to support re-raising an exception from an earlier position. Creating this integer might need memory allocation and could fail when handling a memory error.

This is incredibly unlikely to ever happen, but we can fix it using tagged integers, which do not require any allocation, so we might as well.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• GH-132508: Use tagged integers on the evaluation stack for the last instruction offset #132545