[kontact] [Bug 340680] another crash-on-exit due to nested event handling

[Sven Eden]

https://bugs.kde.org/show_bug.cgi?id=340680

--- Comment #4 from Sven Eden <sven.eden at gmx.de> ---
Created attachment 94848
  --> https://bugs.kde.org/attachment.cgi?id=94848&action=edit
New crash information added by DrKonqi

kontact (4.14.10) on KDE Platform 4.14.12 using Qt 4.8.7

- What I was doing when the application crashed:

KMail got stuck somewhere, wherever I clicked it said "Please wait while
retrieving folder contents", so I quit kontact.

About ~10 seconds later DrKonqi showed up, and the backtraces suggest this is
the same or at least a similar crash.

-- Backtrace (Reduced):
#6  operator QItemSelectionModel* (this=<error reading variable: Cannot access
memory at address 0xe00000110>) at
../../include/QtCore/../../../qt-everywhere-opensource-src-4.8.7/src/corelib/kernel/qpointer.h:78
#7  QAbstractItemView::selectionModel (this=0xe00000108) at
/home/portage/dev-qt/qtgui-4.8.7/work/qt-everywhere-opensource-src-4.8.7/src/gui/itemviews/qabstractitemview.cpp:766
#8  0x00007fdf18bc657c in MailCommon::FolderTreeWidget::selectedCollections
(this=<optimized out>) at
/home/portage/kde-base/kdepim-common-libs-4.14.10/work/kdepim-common-libs-4.14.10/mailcommon/folder/foldertreewidget.cpp:243
#9  0x00007fdf19289ea3 in KMMainWidget::updateFolderMenu (this=0x13fc3d0) at
/home/portage/kde-base/kmail-4.14.10/work/kmail-4.14.10/kmail/kmmainwidget.cpp:3928
#10 0x00007fdf1939aa8b in KMMainWidget::qt_static_metacall (_o=<optimized out>,
_c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at
/home/portage/kde-base/kmail-4.14.10/work/kmail-4.14.10_build/kmail/moc_kmmainwidget.cpp:461

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