https://bugs.winehq.org/show_bug.cgi?id=30161
--- Comment #11 from Alessandro Morelli atanvardo@gmail.com --- Ah sorry, my bad, didn't see the bug replies (I lost access to this email until a few weeks ago).
Anyway:
X3F files are produced by the Sigma cameras and none of them has an orientation sensor, so when you take a picture tilting the camera 90° you get a sideways image.
In the app, you can mark the files as being "rotated", so the app applies the correct rotation to the image automatically, for both the thumbnail and the full image.
Each time the app tried to render the thumbnail of one of such files, it crashed.
This is a rotated file: https://drive.google.com/file/d/0B9HC7ctx22qaX2FIYVNJNUFXZDA/view?usp=sharin...
(12MB, so no attachment)
I *think* the bug could be abandoned, though: this app version is obsolete, Sigma has released a Mac version of the newer app, Linux (with dcraw) has some pretty advanced support for X3F.
However, if someone wants to investigate further, I'll be glad to help however I can.