[konsole] [Bug 451142] New: Removing an Umlaut (ä,ö,ü) enables one to remove parts of the shell prompt

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=451142

            Bug ID: 451142
           Summary: Removing an Umlaut (ä,ö,ü) enables one to remove parts
                    of the shell prompt
           Product: konsole
           Version: 21.12.2
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: keyboard
          Assignee: konsole-devel at kde.org
          Reporter: henri.inndorf at tutanota.com
  Target Milestone: ---

Created attachment 147283
  --> https://bugs.kde.org/attachment.cgi?id=147283&action=edit
Example result

SUMMARY
After entering a text containing an Umlaut (ä,ö,ü), one is able to delete one
more character per Umlaut than should be allowed, i. e. one is able to delete
part of the shell prompt ([user at pc ~]$ ).


STEPS TO REPRODUCE
1. Enter several Umlaute.
2. Hit backspace until you can't delete anymore characters.

OBSERVED RESULT
E. g. for 4 Umlaute, one can delete the "~]$" from the shell prompt.

EXPECTED RESULT
Not being able to remove more characters than I typed (I assume this has
something to do with the encoding of an Umlaut needing two Unicode characters).

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Manjaro Linux (4.19.230-1-MANJARO) (64-bit)
(available in About System)
KDE Plasma Version: 5.24.2
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
Graphics Platform: X11

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