Crash when leaving HMV
Left HMV using the south border and was followed by Gaab'Baay. The game crashed with an "Expected chunk 'MSTR' not found." popup, while the auto-save message was shown. Now the attached save file crashes when loaded with a "Couldn't load the game! [LA]" popup.
In case it's relevant, I was hitting Gaab'Baay with a bunch of traps via wands of trap creation while she was in HMV.
EDIT: The issue appears to be related to the traps. I've attached a working save game that can be ruined by zapping a wand of trap creation at Gaab'Baay's location (teleport trap), and then leaving HMV. There's a "No monster to remove at (64, 11)" popup before the MSTR message, and a "Could not remove directory 'C:\Users\Foo\Documents\ADOM/adom_dat/tmpdat/17652'" popup after.