Further testing:
I installed xterm in a text screen, when back to the graphics screen started xterm and there tried
--- $ qterminal Segmentation fauit (core dumped) ---
So the bug seems to be in the terminal emulator.
Further testing:
I installed xterm in a text screen, when back to the graphics screen started xterm and there tried
---
$ qterminal
Segmentation fauit (core dumped)
---
So the bug seems to be in the terminal emulator.