[kmail2] [Bug 449514] KMail crashes when closing it

[John Franklin]

https://bugs.kde.org/show_bug.cgi?id=449514

--- Comment #4 from John Franklin <franklin at sentaidigital.com> ---
Created attachment 150676
  --> https://bugs.kde.org/attachment.cgi?id=150676&action=edit
New crash information added by DrKonqi

kmail (5.20.2 (22.04.2)) using Qt 5.15.4

- What I was doing when the application crashed:

Exiting and restarting KMail.

- Custom settings of the application:

I use both an Exchange server (Office 365 business) and a pair of IMAP servers.
 The Exchange connection dies on a regular basis, so I close KMail and it
crashes when I try to immediately reopen it.

Using MySQL for the backend.

-- Backtrace (Reduced):
#4  0x00007fac4015f6e5 in QAction::setText(QString const&) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5  0x00007fac48c0bf7a in KMMainWidget::updateFolderMenu() () from
/lib/x86_64-linux-gnu/libkmailprivate.so.5
#6  0x00007fac48c16c69 in KMMainWidget::setupActions() () from
/lib/x86_64-linux-gnu/libkmailprivate.so.5
#7  0x00007fac48c1c5b9 in KMMainWidget::KMMainWidget(QWidget*, KXMLGUIClient*,
KActionCollection*, QExplicitlySharedDataPointer<KSharedConfig> const&) () from
/lib/x86_64-linux-gnu/libkmailprivate.so.5
#8  0x00007fac48bc79bb in KMMainWin::KMMainWin(QWidget*) () from
/lib/x86_64-linux-gnu/libkmailprivate.so.5

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