I’ve found that GMIC crashes if you try to rotate an image under certain conditions. Here is the log
Resize image [0] to 1536x115x1x3, with nearest-neighbor interpolation, dirichlet boundary conditions and alignment (0,0,0,0).
Rotate image [0] of 36.87 deg., with cubic interpolation and periodic boundary conditions.
Logfile ends.
Rotating the image by 36.8698 degrees or 36.88 works fine.
After some investigations, I’ve found the bug and hopefully made a valid fix.
It appears that due to limited floating-point precision, it happened that computing the modulo returned an out-of-limit value (basically X mod Y returned Y, rather than 0, with X a floating point value very close to -0 and Y a large integer).
I think I’ll be able to release new pre-release packages of G’MIC, on next Monday.