[konsole] [Bug 397746] New: Confirm Paste dialog crashes konsole

[Lukas Sabota]

https://bugs.kde.org/show_bug.cgi?id=397746

            Bug ID: 397746
           Summary: Confirm Paste dialog crashes konsole
           Product: konsole
           Version: 18.08.0
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: copy-paste
          Assignee: konsole-devel at kde.org
          Reporter: lukas at lwsabota.com
  Target Milestone: ---

When pasting a large amount of text in Konsole, the "Confirm Paste - Konsole"
dialog is raised which asks "Are you sure you want to paste <x> characters?". 
However, every time this dialog appears, I am unable to click on "Continue" or
"Cancel" and the parent Konsole also crashes.

In addition (may be a separate bug?) - when attempting to close the "Confirm
Paste" dialog with the close button on the window titelbar, kwin raises a
"Warning - Window Manager" dialog to inform that "Application 'konsole' is not
responding".  However, I unable to click on "Terminate" or "Wait longer". 
Shortly after attempting to click on the unresponsive KWin dialog, another
"Warning - Window Manager" dialog is raised, but this time because "Application
kwin_killer_helper" is not responding.  If I click on the new dialog, it will
not respond and another "kwin_killer_helper" dialog will appear.

I am able to reproduce this Konsole issue reliably with about 20k characters. 
I am also able to reproduce this kwin issue on any hanging window - not just
Konsole windows.  I'm not sure if this is a Konsole bug, a KMessageBox bug (or
some other KDE API), a Kwin bug, or a Konsole and Kwin bug - but I wanted to
get a discussion rolling about this issue and see if others are able to
reproduce.

Please let me know if there is any additional information to provide - I would
be happy to assist troubleshooting this issue.

Cheers

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