I just stumbled upon a crash in zoomable lighttable in darktable 4.6.0.
I can reproduce it at will doing the following - with 2 photos in the lighttable.
Step 1:
Zoome the thumbnails to a small size, in the example I set the “row length” to 20.
Step 2:
Move the 2 thumbnails to upper left corner, so the left one is not visible
Step 3:
Reduce the “row length” using the mouse wheel (so the thumbnails get bigger), and kaboom!
I have created a couple of screen shots to illustrate the issue, and captuted the console output from darktable.
The 2 attached files are licensed under the Creative Commons CC0 1.0 Universal license
I have compiled DT 4.6.0 myself in this way