infinitymdm Here is the sequence of events, as best I can recall.
Launched Nautilus
Used popover menu to show hidden files
Navigated to ~/.config/gtk-4.0
Right clicked on gtk.css, and clicked rename
Pressed right arrow key
Expected: Cursor moves to the end of the text entry box so I can tack a ".old" onto my file.
Actual result: Nautilus immediately crashed.
Just repeated this procedure a few times. Nautilus crashed 6 out of 10 times. Still far too small of a sample size to be meaningful, but I'm not going to test like that all day, so...
Anyways, the crashes spit out this pango error:
(org.gnome.Nautilus:5916): Pango-CRITICAL **: 19:40:30.418: _pango_layout_get_iter: assertion 'PANGO_IS_LAYOUT (layout)' failed
Segmentation fault (core dumped)
I suppose that means I can conclusively say this is related to Pango. I'd probably better go report it, or at least follow up on that other issue I linked earlier.
One final note: selecting the file (with a left click) prior to right click > rename seems to prevent the crash. So I guess the workaround for now is to make sure you select your files before right clicking to rename them.