bpo-31626: Fixed a bug in debug memory allocator. by serhiy-storchaka · Pull Request #3844 · python/cpython

There was a write to freed memory after shrinking a memory block.

serhiy-storchaka pushed a commit that referenced this pull request

Removed a code that incorrectly detected in-place resizing in realloc()
 and wrote to freed memory.
(cherry picked from commit b484d56)

embray pushed a commit to embray/cpython that referenced this pull request

Removed a code that incorrectly detected in-place resizing in realloc()
 and wrote to freed memory.