I had a cursed acidic battle axe which was worth '-0' gold. The shop refused to buy it, which is as expected, however left clicking on it caused the client to crash.
The game continued ok after restarting and loading a prior save, so I just dropped the offending item. Looking at the te4_log, it doesn't appear to have anything about the crash. I'll get a screenshot of the specific lua error next time.
B34 - low level cursed items can have negative value + crash
Moderator: Moderator