0.8G seems to grow unstable after a few hundred moves and then will randomly crash when targetting monsters and give script errors upon entering the bank. Reloading the save will fall back to the last autosave, but targetting monsters will still cause crashes sometimes. It seems that the monster being targetted is corrupt in some way, since if I reload the save and target the monster that caused the crash before, it will crash again 100%, but targetting other monsters results in a lottery until I find the next monster that will cause the crash.
On windows 11.
edit: event viewer reports that it's an exception code 0xc0000409, which duckduckgo tells me a stack overflow.
Faulting module name: ZMAngband.exe, version: 0.0.0.0, time stamp: 0x6956b7e2
Exception code: 0xc0000409
Fault offset: 0x001446c6