Entities have a pointer to their parent entity. If the parent entity is freed first, then freeing the child will cause access to the already freed parent.
This is fixed by adding a child pointer and clearing the child and parent pointers when either child or parent is freed.
Because no tools can detect it uninitialized well, tried Memory
Sanitizer (needs all libs including libc++ compiled with it), valgrind
(only detects in LTO build), compiler warnings. Might be related to
unions.
Purely automatic change. In case of conflict with this change, apply the
other change and rerun the formatting to restore it:
$ python scripts/fix_style.py