[okular] [Bug 424249] New: Segmentation fault when closing a tab by using the keyboard shortcuts

[ParsaMousavi]

https://bugs.kde.org/show_bug.cgi?id=424249

            Bug ID: 424249
           Summary: Segmentation fault when closing a tab by using the
                    keyboard shortcuts
           Product: okular
           Version: unspecified
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: sepamou at gmail.com
  Target Milestone: ---
             Flags: Usability+

Created attachment 130145
  --> https://bugs.kde.org/attachment.cgi?id=130145&action=edit
Okular crash backtrace

I've assigned the hotkey "Ctrl+W" for closing a tab in Settings->Configure
keyboard shortcuts->Close.
Whenever I close a tab by pressing "Ctrl+W" , Okular crashes and causes all the
opened documents to get closed.That only happens when there are at least "2"
open documents in the same window.By the way I've enabled the option "Open new
files in tabs" if that matters.

The output of Okular in its stderr after the crash :
```
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = okular path = /usr/bin pid = 28214
KCrash: Arguments: /usr/bin/okular some_file.pdf 
KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi
```

And the full backtrace is included as an attachment although the KDE Crash
Handler says it's probably not useful.

STEPS TO REPRODUCE:
1. Open Okular
2. Assign a shortcut for "Close" in Settings->Configure keyboard shortcuts
3. Use that shortcut when you have at least two opened documents at the same
time.



SOFTWARE/OS VERSIONS

Linux/KDE Plasma: 5.3.0 / KDE Neon Unstable
KDE Plasma Version: 5.19.80
KDE Frameworks Version: 5.73.0
Qt Version: 5.14.2

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