[kmail2] [Bug 479158] New: Replying to mesages inlng threads still causes kmail to freeze

[B. Scheichl]

https://bugs.kde.org/show_bug.cgi?id=479158

            Bug ID: 479158
           Summary: Replying to mesages inlng threads still causes kmail
                    to freeze
    Classification: Applications
           Product: kmail2
           Version: 5.24.3
          Platform: openSUSE
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: message list
          Assignee: kdepim-bugs at kde.org
          Reporter: bernhard.scheichl at tuwien.ac.at
  Target Milestone: ---

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
Replying to the last email in a long thread (about >10 emails) becomes
impossible: at first, there si long delay betwen typing and the actual input in
the composer window. After some time, the window freezes, typing-in is no
longer possible and a pop-up window suggests to terminate Kmail2. Teminating
causes Kmail2 eventually to crash. Restarting Kmail2 takes quite long, then the
last message window pops up agin and must be killed to work with Kmail2 again,
but replaying to the last email is not possible. 

STEPS TO REPRODUCE
1. Produce rather long threaded message list (about more than 10 replies
emails).
2. Try to reply to last message.
3. Typing in answering window heavily delayed, finally Kmail freezes, message
pops up after about 1 minute, suggests to terminate Kmail2 - no more action
possible part from terminating.
4. Terminate Kmail2.
5. Restart Kmail2.

OBSERVED RESULT
Kmail freezes, message pops up after about 1 minute, suggests to terminate
Kmail2, crashes after termination, starting Kmail again gives a long delay,
last message window pops up again and must be killed to go on. 

EXPECTED RESULT
Simply reply to last message!

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: KDE Frameworks 5.112.0
(available in About System)
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Was already claimed yers ago - still not solved!!

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