[kmail2] [Bug 449927] New: kmail crashes on startup after crashing when switching folders

[Timo Wilken]

https://bugs.kde.org/show_bug.cgi?id=449927

            Bug ID: 449927
           Summary: kmail crashes on startup after crashing when switching
                    folders
           Product: kmail2
           Version: 5.19.2
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: kdebugs at twilken.net
  Target Milestone: ---

Created attachment 146528
  --> https://bugs.kde.org/attachment.cgi?id=146528&action=edit
kmail startup and debug log

SUMMARY
After looking at emails and switching folders a few times, when switching back
to an inbox, kontact crashes.

I'm not sure, but the crash may have happened when switching to a folder where
the first message was signed using an RSA4096 GPG key, of which I have the
public key stored in KGPG.

Subsequently trying to reopen kontact or kmail crashes with a segfault (see
attached log).


STEPS TO REPRODUCE
1. open kontact/kmail and switch folders a few times, possibly opening a
GPG-signed message
2. kontact/kmail crashes
3. try to reopen kmail
4. kmail keeps segfaulting

OBSERVED RESULT
kmail crashes upon startup, without showing a window. See attached log for
details.

EXPECTED RESULT
kmail starts normally.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kernel 5.16.8-arch1-1
(available in About System)
KDE Plasma Version: 5.24.0
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

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