[1.6.6] game hang on level gen

[cowking]

Game got stuck loading dreadfell 4 with the please wait while generating level message, had to alt-tab out of the game and ctrl-alt-del the game process which was unresponsive. Luckily I was able to load the save and go down without another error.

Won't let me post the full dreadfell 4 mapgen log so I put it on pastebin [LINK]