Application that crashed: kmail
Version of the application: 1.12.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-1-amd64 x86_64
Distribution: Debian GNU/Linux 5.0.3 (lenny)

What I was doing when the application crashed:
Kmail crashes every time I try to compact mbox mailbox of 23 MB size, 12600+ messages

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f5d39705033 in KMail::MessageListView::StorageModel::initializeMessageItem (this=0x1c667b0, mi=0x2116780, row=<value optimized out>, bUseReceiver=false)
    at ../../kmail/messagelistview/storagemodel.cpp:402
#6  0x00007f5d3972b710 in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJobPass1Fill (this=0x1c54d20, job=0x2183fc0, tStart=...) at ../../kmail/messagelistview/core/model.cpp:2750
#7  0x00007f5d3972d025 in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJob (this=0x1c54d20, job=0x1a9d11, tStart=...) at ../../kmail/messagelistview/core/model.cpp:3392
#8  0x00007f5d3972d83b in KMail::MessageListView::Core::Model::viewItemJobStepInternal (this=0x1c54d20) at ../../kmail/messagelistview/core/model.cpp:3764
#9  0x00007f5d3972e39e in KMail::MessageListView::Core::Model::viewItemJobStep (this=0x1c54d20) at ../../kmail/messagelistview/core/model.cpp:3952
#10 0x00007f5d3972f63f in KMail::MessageListView::Core::Model::setStorageModel (this=0x1c54d20, storageModel=<value optimized out>, 
    preSelectionMode=KMail::MessageListView::Core::PreSelectLastSelected) at ../../kmail/messagelistview/core/model.cpp:806
#11 0x00007f5d397300e9 in KMail::MessageListView::Core::Model::slotStorageModelLayoutChanged (this=<value optimized out>) at ../../kmail/messagelistview/core/model.cpp:4435
#12 0x00007f5d39305718 in KMail::MessageListView::Core::Model::qt_metacall (this=0x1c54d20, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff94890a40) at moc_model.cpp:80
#13 0x00007f5d38bec682 in QMetaObject::activate (sender=0x1c667b0, from_signal_index=<value optimized out>, to_signal_index=17, argv=0x0) at kernel/qobject.cpp:3112
#14 0x00007f5d38bd1314 in QAbstractItemModel::reset (this=0x1c667b0) at kernel/qabstractitemmodel.cpp:2263
#15 0x00007f5d39304718 in KMail::MessageListView::StorageModel::qt_metacall (this=0x1c667b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff94890b90) at moc_storagemodel.cpp:92
#16 0x00007f5d38bec682 in QMetaObject::activate (sender=0x18abd10, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x0) at kernel/qobject.cpp:3112
#17 0x00007f5d393e1eef in KMFolder::setUserWhoField (this=0x18abd10, whoField=..., writeConfig=false) at ../../kmail/kmfolder.cpp:745
#18 0x00007f5d393e2c42 in KMFolder::readConfig (this=0x18abd10, configGroup=...) at ../../kmail/kmfolder.cpp:211
#19 0x00007f5d3940dc34 in FolderStorage::readConfig (this=0x18a9f70) at ../../kmail/folderstorage.cpp:963
#20 0x00007f5d39409f20 in FolderStorage::countUnread (this=0x18a9f70) at ../../kmail/folderstorage.cpp:866
#21 0x00007f5d395bdba5 in KMMainWidget::updateMarkAsReadAction (this=0x1c32980) at ../../kmail/kmmainwidget.cpp:4428
#22 0x00007f5d395e18fd in KMMainWidget::qt_metacall (this=0x1c32980, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff94891170) at ./kmmainwidget.moc:478
#23 0x00007f5d38bec682 in QMetaObject::activate (sender=0x18abd10, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#24 0x00007f5d393dda0d in KMFolder::qt_metacall (this=0x18abd10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff94891270) at ./kmfolder.moc:111
#25 0x00007f5d38bec682 in QMetaObject::activate (sender=0x18a9f70, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#26 0x00007f5d394a1628 in KMFolderMbox::compact (this=0x18a9f70, silent=<value optimized out>) at ../../kmail/kmfoldermbox.cpp:1325
#27 0x00007f5d395bf449 in KMMainWidget::slotCompactFolder (this=0x1c32980) at ../../kmail/kmmainwidget.cpp:1476
#28 0x00007f5d395e1d9d in KMMainWidget::qt_metacall (this=0x1c32980, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff94891450) at ./kmmainwidget.moc:405
#29 0x00007f5d38bec682 in QMetaObject::activate (sender=0x1ee1050, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x0) at kernel/qobject.cpp:3112
#30 0x00007f5d38049937 in QAction::triggered (this=0x18a9f70, _t1=false) at .moc/release-shared/moc_qaction.cpp:236
#31 0x00007f5d3804adb0 in QAction::activate (this=0x1ee1050, event=<value optimized out>) at kernel/qaction.cpp:1160
#32 0x00007f5d384465ed in QMenuPrivate::activateCausedStack (this=0x1f28e50, causedStack=..., action=0x1ee1050, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:967
#33 0x00007f5d3844c55f in QMenuPrivate::activateAction (this=0x1f28e50, action=0x1ee1050, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1060
#34 0x00007f5d3a35db11 in KMenu::mouseReleaseEvent (this=0x2061290, e=0x7fff94892090) at ../../kdeui/widgets/kmenu.cpp:456
#35 0x00007f5d3809fb4f in QWidget::event (this=0x2061290, event=0x7fff94892090) at kernel/qwidget.cpp:7549
#36 0x00007f5d3844ecbb in QMenu::event (this=0x2061290, e=0x7fff94892090) at widgets/qmenu.cpp:2353
#37 0x00007f5d3804f80d in QApplicationPrivate::notify_helper (this=0x17cbd80, receiver=0x2061290, e=0x7fff94892090) at kernel/qapplication.cpp:4056
#38 0x00007f5d38057fba in QApplication::notify (this=<value optimized out>, receiver=0x2061290, e=0x7fff94892090) at kernel/qapplication.cpp:3758
#39 0x00007f5d3a28c43b in KApplication::notify (this=0x7fff94896a70, receiver=0x2061290, event=0x7fff94892090) at ../../kdeui/kernel/kapplication.cpp:302
#40 0x00007f5d38bd751c in QCoreApplication::notifyInternal (this=0x7fff94896a70, receiver=0x2061290, event=0x7fff94892090) at kernel/qcoreapplication.cpp:610
#41 0x00007f5d38057268 in QCoreApplication::sendSpontaneousEvent (receiver=0x2061290, event=0x7fff94892090, alienWidget=0x0, nativeWidget=0x2061290, buttonDown=<value optimized out>, 
    lastMouseReceiver=...) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#42 QApplicationPrivate::sendMouseEvent (receiver=0x2061290, event=0x7fff94892090, alienWidget=0x0, nativeWidget=0x2061290, buttonDown=<value optimized out>, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#43 0x00007f5d380bffb4 in QETWidget::translateMouseEvent (this=0x2061290, event=<value optimized out>) at kernel/qapplication_x11.cpp:4343
#44 0x00007f5d380bebaf in QApplication::x11ProcessEvent (this=0x7fff94896a70, event=0x7fff94893a60) at kernel/qapplication_x11.cpp:3550
#45 0x00007f5d380e6e9c in x11EventSourceDispatch (s=0x17cf700, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#46 0x00007f5d2ff7012a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#47 0x00007f5d2ff73988 in ?? () from /lib/libglib-2.0.so.0
#48 0x00007f5d2ff73b3c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#49 0x00007f5d38bffbff in QEventDispatcherGlib::processEvents (this=0x1798170, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#50 0x00007f5d380e664f in QGuiEventDispatcherGlib::processEvents (this=0x18a9f70, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#51 0x00007f5d38bd5de2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#52 0x00007f5d38bd61b4 in QEventLoop::exec (this=0x7fff94893d90, flags=...) at kernel/qeventloop.cpp:201
#53 0x00007f5d3844eb35 in QMenu::exec (this=<value optimized out>, p=..., action=0x0) at widgets/qmenu.cpp:1993
#54 0x00007f5d3939150f in KMail::FolderView::contextMenuEvent (this=0x1d33180, e=0x7fff94894b90) at ../../kmail/folderview.cpp:1563
#55 0x00007f5d380a001b in QWidget::event (this=0x1d33180, event=0x7fff94894b90) at kernel/qwidget.cpp:7708
#56 0x00007f5d38408cdb in QFrame::event (this=0x1d33180, e=0x7fff94894b90) at widgets/qframe.cpp:559
#57 0x00007f5d3853b77b in QAbstractItemView::viewportEvent (this=0x1d33180, event=0x7fff94894b90) at itemviews/qabstractitemview.cpp:1476
#58 0x00007f5d385734e9 in QTreeView::viewportEvent (this=0x1d33180, event=0x7fff94894b90) at itemviews/qtreeview.cpp:1266
#59 0x00007f5d38bd6838 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x1d36a30, event=0x7fff94894b90) at kernel/qcoreapplication.cpp:726
#60 0x00007f5d3804f7dc in QApplicationPrivate::notify_helper (this=0x17cbd80, receiver=0x1d36a30, e=0x7fff94894b90) at kernel/qapplication.cpp:4052
#61 0x00007f5d38057cfa in QApplication::notify (this=<value optimized out>, receiver=0x1d36a30, e=0x7fff94894b90) at kernel/qapplication.cpp:3845
#62 0x00007f5d3a28c43b in KApplication::notify (this=0x7fff94896a70, receiver=0x1d36a30, event=0x7fff94894b90) at ../../kdeui/kernel/kapplication.cpp:302
#63 0x00007f5d38bd751c in QCoreApplication::notifyInternal (this=0x7fff94896a70, receiver=0x1d36a30, event=0x7fff94894b90) at kernel/qcoreapplication.cpp:610
#64 0x00007f5d380c043b in QETWidget::translateMouseEvent (this=0x1806dd0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4415
#65 0x00007f5d380bebaf in QApplication::x11ProcessEvent (this=0x7fff94896a70, event=0x7fff94896590) at kernel/qapplication_x11.cpp:3550
#66 0x00007f5d380e6e9c in x11EventSourceDispatch (s=0x17cf700, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#67 0x00007f5d2ff7012a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#68 0x00007f5d2ff73988 in ?? () from /lib/libglib-2.0.so.0
#69 0x00007f5d2ff73b3c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#70 0x00007f5d38bffbff in QEventDispatcherGlib::processEvents (this=0x1798170, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#71 0x00007f5d380e664f in QGuiEventDispatcherGlib::processEvents (this=0x18a9f70, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#72 0x00007f5d38bd5de2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#73 0x00007f5d38bd61b4 in QEventLoop::exec (this=0x7fff948968c0, flags=...) at kernel/qeventloop.cpp:201
#74 0x00007f5d38bd8424 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#75 0x0000000000402fab in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:146

This bug may be a duplicate of or related to bug 207642

Reported using DrKonqi