Reproducible crash, involving iop lens and masks (memory corruption?)
I attached several sample bt's.Last message in console before crash:
- (darktable:18137): WARNING **: WARNING: lens \xc0\u001a\u0005\x8c\u0006\u007f/\xa0\xa7\u0013\x8c\u0006\u007f has multiple vignetting models defined
Approximate steps to crash:
Create a lot duplicates of some image(~15 will be enough), open most middle-one, instantly zoom 200% (to eyes), select "color zones" -> "black & white" preset, set blend to drawn mask, click on "add circle", click on eye and start zooming new mask
I had tried to bisect it, without much luck: so far i'm 100% sure that it goes back as long as tag release-1.4 (i successfully crashed it).
(This is Debian GNU/Linux sid)