[kmail2] [Bug 445393] New: Kmail freezes when trying to compose a reply with a long quoted thread.

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https://bugs.kde.org/show_bug.cgi?id=445393

            Bug ID: 445393
           Summary: Kmail freezes when trying to compose a reply with a
                    long quoted thread.
           Product: kmail2
           Version: 5.16.3
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: composer
          Assignee: kdepim-bugs at kde.org
          Reporter: caxilbund at iasinfo.com
  Target Milestone: ---

SUMMARY
 If you highlight only a part (the most recent part) of the received mail and
then, hit either “Reply” or “Reply all”, KMail behaves normally.
If, however, you Reply (or, Reply all) with the complete thread, KMail freezes.


STEPS TO REPRODUCE
1. Hit reply or reply all to an email at the end of a long thread that has been
quoted.


OBSERVED RESULT

2. A compose window starts to open but freezes before the window is populated.
Depending on the length of the thread the freeze may end after some time and
allow you to edit the new email.
3.  If you edit in a previously frozen message, there will be lags,
particularly on a new line or backspace.
4. If only the most recent part of the thread is highlighted before hitting
reply, KMail performs normally.


EXPECTED RESULT
Normal new message window.


SOFTWARE/OS VERSIONS


Linux/KDE Plasma: OpenSuse 15.3 with kernel 5.3.18
(available in About System)
KDE Plasma Version: 5.23.2
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

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