CIFuzz build failures - _freeze_module segfaults during the build, fuzz testing doesn't start. #116886
Description
PR authors and core devs have been seeing CIFuzz failures on PRs not related to their changes of late. These are non-blocking, but confusing.
The CIFuzz build step is failing, it seems that _freeze_module crashes:
./Programs/_freeze_module importlib._bootstrap_external ./Lib/importlib/_bootstrap_external.py Python/frozen_modules/importlib._bootstrap_external.h
Segmentation fault (core dumped)
I believe _freeze_module got compiled with memory-sanitizer but no useful MSAN report seems to be generated by that crash.
Unclear where the problem lies, maybe this could be CIFuzz container or clang related?
CIFuzz background: read PR #107653 (discussion and links) and Issue #107652 (the pitch).
CPython versions tested on:
CPython main branch
Operating systems tested on:
Linux