Application that crashed: kate
Version of the application: 3.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Kate crashed when I was playing with mouse selection:
I clicked with the left button and was moving the mouse when it crashed.

 -- Backtrace:
Application: Kate (kate), signal: Segmentation fault
[KCrash Handler]
#6  KateCodeFoldingNode::getEnd (this=0x942d6c8, tree=0x92ed9a4, end=0xbfe7e8c8) at ../../kate/syntax/katecodefolding.cpp:86
#7  0x062daa3c in KateIconBorder::showBlock (this=0x93a4a30, line=66) at ../../kate/view/kateviewhelpers.cpp:1275
#8  0x062db25a in KateIconBorder::mouseMoveEvent (this=0x93a4a30, e=0xbfe7ef00) at ../../kate/view/kateviewhelpers.cpp:1328
#9  0x00d3ae63 in QWidget::event (this=0x93a4a30, event=0xbfe7ef00) at kernel/qwidget.cpp:7534
#10 0x00ce5f54 in QApplicationPrivate::notify_helper (this=0x867eac0, receiver=0x93a4a30, e=0xbfe7ef00) at kernel/qapplication.cpp:4056
#11 0x00cee033 in QApplication::notify (this=0xbfe8090c, receiver=0x93a4a30, e=0xbfe7ef00) at kernel/qapplication.cpp:3758
#12 0x04c04bfa in KApplication::notify (this=0xbfe8090c, receiver=0x93a4a30, event=0xbfe7ef00) at ../../kdeui/kernel/kapplication.cpp:302
#13 0x0059f6cb in QCoreApplication::notifyInternal (this=0xbfe8090c, receiver=0x93a4a30, event=0xbfe7ef00) at kernel/qcoreapplication.cpp:610
#14 0x00cecf6e in QCoreApplication::sendSpontaneousEvent (receiver=0x93a4a30, event=0xbfe7ef00, alienWidget=0x93a4a30, nativeWidget=0x88511a8, buttonDown=0x1560aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#15 QApplicationPrivate::sendMouseEvent (receiver=0x93a4a30, event=0xbfe7ef00, alienWidget=0x93a4a30, nativeWidget=0x88511a8, buttonDown=0x1560aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#16 0x00d5b7c0 in QETWidget::translateMouseEvent (this=0x88511a8, event=0xbfe8054c) at kernel/qapplication_x11.cpp:4409
#17 0x00d5ac4b in QApplication::x11ProcessEvent (this=0xbfe8090c, event=0xbfe8054c) at kernel/qapplication_x11.cpp:3428
#18 0x00d87502 in x11EventSourceDispatch (s=0x8681b68, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#19 0x053b2e88 in g_main_dispatch (context=0x8680c98) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#20 IA__g_main_context_dispatch (context=0x8680c98) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#21 0x053b6730 in g_main_context_iterate (context=0x8680c98, block=<value optimized out>, dispatch=1, self=0x867ec90) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#22 0x053b6863 in IA__g_main_context_iteration (context=0x8680c98, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#23 0x005ca02c in QEventDispatcherGlib::processEvents (this=0x86669d8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#24 0x00d86be5 in QGuiEventDispatcherGlib::processEvents (this=0x86669d8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x0059dc79 in QEventLoop::processEvents (this=0xbfe80844, flags=) at kernel/qeventloop.cpp:149
#26 0x0059e0ca in QEventLoop::exec (this=0xbfe80844, flags=...) at kernel/qeventloop.cpp:201
#27 0x005a053f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#28 0x00ce5dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#29 0x00213b0d in kdemain () from /usr/lib/libkdeinit4_kate.so
#30 0x080485eb in _start ()

Reported using DrKonqi