Created attachment 156070 [details]
list of threads

SUMMARY
After using a program in one tab (namely, GNU info), that spews many BEL characters in short time, and switching to a different tab, konsole become unresponsive, hanging on a lock.

STEPS TO REPRODUCE
1. I used konsole with many tabs for more than 2 months, without problems.
2. In one tab, I ran 'info m4', searched for m4_provide_if, then attempted to abort this search by pressing some of the characters ESC, Enter, Ctrl-Q, repeatedly.
3. I switched to a different tab.
4. At this point many notification popups appeared, each notifying me of a BEL being emitted to the tab where 'info m4' was running.
5. As 'top' showed me that konsole was eating 200% CPU time, I killed the 'info' program.
6. Now konsole was still eating 100% CPU time, and additionally was unresponsive (could not type into the current tab, could not switch to another tab, could not get a menu to open).
7. I got debugging infos from the konsole process ("sudo gdb /usr/bin/konsole 2669").
8. I killed the konsole, thereby losing the state of all tabs (equivalent to when konsole had crashed).

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 22.04
KDE Plasma Version: 5.24.6
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION