Details for the issue

1. Select lines in the upper window
2. Using context menu click "Save to file"
3. In the "filemanager" window type the new file name
4. Click "Save"
5. klogg crashed
   p.s. It also crashes if I select the existing file and click "Replace"

Crash id
aff780d4-9808-4e50-ab58-ee3266977b26

Useful extra information

Klogg version 20.12.0.810 (built from commit f473845) [built for x86_64-little_endian-lp64]
running on Debian GNU/Linux bullseye/sid (linux/5.9.0-4-amd64) [x86_64]
and Qt 5.12.5