Application: kompare (4.0.0)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-24-generic-pae i686
Distribution: Ubuntu 10.04.1 LTS

-- Information about the crash:
I opened two directories, applied some changes and swapped source with destination to apply some changes the other way.

While it was still processing (took a while because the files were mounted on sshfs) I absent mindedly clicked the button to apply another change.

Sig11!

The crash can be reproduced every time.

 -- Backtrace:
Application: Kompare (kompare), signal: Segmentation fault
[KCrash Handler]
#6  0xb2b4627c in KChangeLVI::setDifferenceText (this=0x9a8d2f8) at ../../../kompare/komparenavtreepart/komparenavtreepart.cpp:436
#7  0xb2b47538 in KompareNavTreePart::qt_metacall (this=0x99c8588, _c=QMetaObject::InvokeMetaMethod, _id=24, _a=0xbf913b08) at ./komparenavtreepart.moc:113
#8  0xb60fec9a in QMetaObject::metacall (object=0x99c8588, cl=12, idx=24, argv=0xbf913b08) at kernel/qmetaobject.cpp:237
#9  0xb610d3d5 in QMetaObject::activate (sender=0x9966b18, m=0xb2ccd834, local_signal_index=5, argv=0xbf913b08) at kernel/qobject.cpp:3293
#10 0xb2cb34d9 in KomparePart::applyDifference (this=0x9966b18, _t1=true) at ./kompare_part.moc:210
#11 0xb2cb9dd8 in KomparePart::qt_metacall (this=0x9966b18, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xbf913c58) at ./kompare_part.moc:138
#12 0xb60fec9a in QMetaObject::metacall (object=0x9966b18, cl=12, idx=24, argv=0xbf913c58) at kernel/qmetaobject.cpp:237
#13 0xb610d3d5 in QMetaObject::activate (sender=0x9996858, m=0xb2ca1be8, local_signal_index=6, argv=0xbf913c58) at kernel/qobject.cpp:3293
#14 0xb2c83d89 in Diff2::KompareModelList::applyDifference (this=0x9996858, _t1=true) at ./komparemodellist.moc:212
#15 0xb2c8423c in Diff2::KompareModelList::slotApplyDifference (this=0x9996858, apply=true) at ../../../kompare/libdiff2/komparemodellist.cpp:862
#16 0xb2c8ae73 in Diff2::KompareModelList::slotActionApplyDifference (this=0x9996858) at ../../../kompare/libdiff2/komparemodellist.cpp:1404
#17 0xb2c8d858 in Diff2::KompareModelList::qt_metacall (this=0x9996858, _c=QMetaObject::InvokeMetaMethod, _id=26, _a=0xbf913e08) at ./komparemodellist.moc:152
#18 0xb60fec9a in QMetaObject::metacall (object=0x9996858, cl=12, idx=26, argv=0xbf913e08) at kernel/qmetaobject.cpp:237
#19 0xb610d3d5 in QMetaObject::activate (sender=0x9996a30, m=0xb6ec9d58, local_signal_index=1, argv=0xbf913e08) at kernel/qobject.cpp:3293
#20 0xb659abd9 in QAction::triggered (this=0x9996a30, _t1=false) at .moc/release-shared/moc_qaction.cpp:263
#21 0xb659cdcc in QAction::activate (this=0x9996a30, event=QAction::Trigger) at kernel/qaction.cpp:1255
#22 0xb6a8fbd2 in QAction::trigger (this=0x1) at ../../include/QtGui/../../src/gui/kernel/qaction.h:218
#23 QToolButton::nextCheckState (this=0x1) at widgets/qtoolbutton.cpp:1147
#24 0xb69accb3 in QAbstractButtonPrivate::click (this=0x99ad3b0) at widgets/qabstractbutton.cpp:528
#25 0xb69acfae in QAbstractButton::mouseReleaseEvent (this=0x99ad1f8, e=0xbf914570) at widgets/qabstractbutton.cpp:1121
#26 0xb6a9009c in QToolButton::mouseReleaseEvent (this=0x99ad1f8, e=0xbf914570) at widgets/qtoolbutton.cpp:721
#27 0xb65ff7f8 in QWidget::event (this=0x99ad1f8, event=0xbf914570) at kernel/qwidget.cpp:7998
#28 0xb69abd4e in QAbstractButton::event (this=0x99ad1f8, e=0x1) at widgets/qabstractbutton.cpp:1080
#29 0xb6a92bca in QToolButton::event (this=0x99ad1f8, event=0xbf914570) at widgets/qtoolbutton.cpp:1163
#30 0xb65a14dc in QApplicationPrivate::notify_helper (this=0x972ccf8, receiver=0x99ad1f8, e=0xbf914570) at kernel/qapplication.cpp:4300
#31 0xb65a89f7 in QApplication::notify (this=0xbf914f48, receiver=0x99ad1f8, e=0xbf914570) at kernel/qapplication.cpp:3865
#32 0xb70c7f2a in KApplication::notify (this=0xbf914f48, receiver=0x99ad1f8, event=0xbf914570) at ../../kdeui/kernel/kapplication.cpp:302
#33 0xb60f9a3b in QCoreApplication::notifyInternal (this=0xbf914f48, receiver=0x99ad1f8, event=0xbf914570) at kernel/qcoreapplication.cpp:704
#34 0xb65a7952 in QCoreApplication::sendEvent (receiver=0x99ad1f8, event=0xbf914570, alienWidget=0x99ad1f8, nativeWidget=0x99b7ad8, buttonDown=0xb6ee5058, lastMouseReceiver=..., spontaneous=true)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#35 QApplicationPrivate::sendMouseEvent (receiver=0x99ad1f8, event=0xbf914570, alienWidget=0x99ad1f8, nativeWidget=0x99b7ad8, buttonDown=0xb6ee5058, lastMouseReceiver=..., spontaneous=true)
    at kernel/qapplication.cpp:2965
#36 0xb6633088 in QETWidget::translateMouseEvent (this=0x99b7ad8, event=0xbf914a8c) at kernel/qapplication_x11.cpp:4368
#37 0xb6632511 in QApplication::x11ProcessEvent (this=0xbf914f48, event=0xbf914a8c) at kernel/qapplication_x11.cpp:3379
#38 0xb666160a in x11EventSourceDispatch (s=0x972ff68, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#39 0xb56e05e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#40 0xb56e42d8 in ?? () from /lib/libglib-2.0.so.0
#41 0xb56e44b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#42 0xb61255d5 in QEventDispatcherGlib::processEvents (this=0x97179c0, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#43 0xb6661135 in QGuiEventDispatcherGlib::processEvents (this=0x97179c0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#44 0xb60f8059 in QEventLoop::processEvents (this=0xbf914d84, flags=) at kernel/qeventloop.cpp:149
#45 0xb60f84aa in QEventLoop::exec (this=0xbf914d84, flags=...) at kernel/qeventloop.cpp:201
#46 0xb60fc69f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#47 0xb65a1577 in QApplication::exec () at kernel/qapplication.cpp:3579
#48 0x080507b1 in main (argc=3, argv=0xbf915224) at ../../kompare/main.cpp:228

Reported using DrKonqi