I lost a game prototype to that bug as it crashed my HDD at the same time by writing swap over swap. Screwing up the S.M.A.R.T. page.
Hard reboot left it doa. With today’s tools it could have been recovered but I lacked gparted and a kali thumb stick to bring it back. So thankful for Linux.
Visual C++ v4.2b generating an assignment operator which invoked the destructor of a returned object before assigning it to the lval.
That was fun to figure out. :-/