Application: kate (3.8.1)
KDE Platform Version: 4.8.1 (4.8.1)
Qt Version: 4.8.0
Operating System: Linux 3.2.0-21-generic x86_64
Distribution: Ubuntu precise (development branch)

-- Information about the crash:
- What I was doing when the application crashed:

I had two files open (files are within an sshfs-mounted fs), then closed them both (leaving no files loaded). I then right-clicked on the toolbar to configure it, and it either crashed then or crashed on the first-level selection (don't recall which).

- Custom settings of the application:

Kate running on Xubuntu 12.04beta within a virtualbox VM. Toolbar set on small icons, no titles. File list docked on right, no margins. This is the default session, which I had recently saved.

-- Backtrace:
Application: Kate (kate), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f79122e1780 (LWP 3016))]

Thread 2 (Thread 0x7f78f75da700 (LWP 3017)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f78f7fab212 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f78f7fab249 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f790f201e9a in start_thread (arg=0x7f78f75da700) at pthread_create.c:308
#4  0x00007f7911c184bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f79122e1780 (LWP 3016)):
[KCrash Handler]
#6  0x00007f7910ad3b12 in deref (this=0x1a6f7d0) at ../../kdecore/kernel/kcomponentdata_p.h:72
#7  KComponentData::~KComponentData (this=0x7fff90873840, __in_chrg=<optimized out>) at ../../kdecore/kernel/kcomponentdata.cpp:123
#8  0x00007f79101e591f in KActionCollection::KActionCollection (this=0x1a9e8c0, parent=0x13b65f8) at ../../kdeui/actions/kactioncollection.cpp:115
#9  0x00007f79103d2258 in KXMLGUIClient::actionCollection (this=0x13b65f8) at ../../kdeui/xmlgui/kxmlguiclient.cpp:132
#10 0x00007f79103c4c2d in KToolBar::Private::findAction (this=<optimized out>, actionName=..., clientOut=0x0) at ../../kdeui/widgets/ktoolbar.cpp:548
#11 0x00007f79103c52d7 in KToolBar::Private::slotContextAboutToShow (this=0x295c7b0) at ../../kdeui/widgets/ktoolbar.cpp:574
#12 0x00007f790fadb8f1 in QMetaObject::activate (sender=0x1e3e5e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#13 0x00007f7911471f42 in QMenu::popup (this=0x1e3e5e0, p=..., atAction=0x0) at widgets/qmenu.cpp:1832
#14 0x00007f7911472a1d in QMenu::exec (this=<optimized out>, p=..., action=0x0) at widgets/qmenu.cpp:2101
#15 0x00007f79103c5242 in contextMenuEvent (event=0x7fff908744d0, this=0x1a59dd0) at ../../kdeui/widgets/ktoolbar.cpp:873
#16 KToolBar::contextMenuEvent (this=0x1a59dd0, event=0x7fff908744d0) at ../../kdeui/widgets/ktoolbar.cpp:867
#17 0x00007f7911073cb4 in QWidget::event (this=0x1a59dd0, event=0x7fff908744d0) at kernel/qwidget.cpp:8528
#18 0x00007f79114ab47b in QToolBar::event (this=0x1a59dd0, event=0x7fff908744d0) at widgets/qtoolbar.cpp:1250
#19 0x00007f79110236b4 in notify_helper (e=0x7fff908744d0, receiver=0x1a59dd0, this=0xe76460) at kernel/qapplication.cpp:4555
#20 QApplicationPrivate::notify_helper (this=0xe76460, receiver=0x1a59dd0, e=0x7fff908744d0) at kernel/qapplication.cpp:4527
#21 0x00007f79110289ed in QApplication::notify (this=<optimized out>, receiver=0x1a59dd0, e=0x7fff908744d0) at kernel/qapplication.cpp:4177
#22 0x00007f79102d2906 in KApplication::notify (this=0x7fff908751d0, receiver=0x1a59dd0, event=0x7fff908744d0) at ../../kdeui/kernel/kapplication.cpp:311
#23 0x00007f790fac750c in QCoreApplication::notifyInternal (this=0x7fff908751d0, receiver=0x1a59dd0, event=0x7fff908744d0) at kernel/qcoreapplication.cpp:876
#24 0x00007f79110a3a78 in sendSpontaneousEvent (event=0x7fff908744d0, receiver=0x1a59dd0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#25 QETWidget::translateMouseEvent (this=<optimized out>, event=<optimized out>) at kernel/qapplication_x11.cpp:4622
#26 0x00007f79110a29ce in QApplication::x11ProcessEvent (this=0x7fff908751d0, event=0x7fff90874d70) at kernel/qapplication_x11.cpp:3732
#27 0x00007f79110cbe92 in x11EventSourceDispatch (s=0xe77d00, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007f790ed34c9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f790ed35060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f790ed35124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f790faf6a2f in QEventDispatcherGlib::processEvents (this=0xe40b30, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#32 0x00007f79110cbb1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#33 0x00007f790fac62f2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#34 0x00007f790fac6547 in QEventLoop::exec (this=0x7fff90875110, flags=...) at kernel/qeventloop.cpp:204
#35 0x00007f790facb5d7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#36 0x00007f7911ee90d5 in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../../kate/app/katemain.cpp:377
#37 0x00007f7911b4776d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=4, ubp_av=0x7fff90876708, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff908766f8) at libc-start.c:226
#38 0x0000000000400661 in _start ()

Reported using DrKonqi