Application: kate (3.8.1)
KDE Platform Version: 4.8.1 (4.8.1)
Qt Version: 4.8.0
Operating System: Linux 3.0.0-17-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I had two documents open using the "Split vertical" button.
I right-clicked the main toolbar (under the menu).
The application crashed.

I can reproduce this consistently. Sometimes I need to right-click two or three times to trigger the crash, but it always happens quickly enough.

The crash can be reproduced every time.

-- Backtrace:
Application: Kate (kate), signal: Segmentation fault
[Current thread is 1 (Thread 0x7faf5efe17a0 (LWP 21073))]

Thread 4 (Thread 0x7faf4bfad700 (LWP 21074)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007faf4cb8a042 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007faf4cb8a079 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007faf5bf36efc in start_thread (arg=0x7faf4bfad700) at pthread_create.c:304
#4  0x00007faf5e93a59d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7faf43fff700 (LWP 21093)):
#0  0x00007faf5e92e473 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007faf5ba64f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faf5ba65429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faf5c832c06 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007faf5c8023e2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007faf5c802637 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007faf5c702067 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007faf5c7e217f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007faf5c70508b in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007faf5bf36efc in start_thread (arg=0x7faf43fff700) at pthread_create.c:304
#10 0x00007faf5e93a59d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7faf435fa700 (LWP 21138)):
#0  0x00007faf5bf3a1fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7faf44004728) at pthread_mutex_unlock.c:290
#2  0x00007faf5ba63f3f in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faf5ba64dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007faf5ba65429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007faf5c832c06 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007faf5c8023e2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007faf5c802637 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007faf5c702067 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007faf5c7e217f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007faf5c70508b in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007faf5bf36efc in start_thread (arg=0x7faf435fa700) at pthread_create.c:304
#12 0x00007faf5e93a59d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7faf5efe17a0 (LWP 21073)):
[KCrash Handler]
#6  0x00007faf5cf1d145 in KActionCollection::action(QString const&) const () from /usr/lib/libkdeui.so.5
#7  0x00007faf5d0fe148 in KToolBar::Private::findAction(QString const&, KXMLGUIClient**) const () from /usr/lib/libkdeui.so.5
#8  0x00007faf5d0fe7e7 in KToolBar::Private::slotContextAboutToShow() () from /usr/lib/libkdeui.so.5
#9  0x00007faf5d100315 in KToolBar::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeui.so.5
#10 0x00007faf5c817be9 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007faf5e1a3452 in QMenu::popup(QPoint const&, QAction*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007faf5e1a3f2d in QMenu::exec(QPoint const&, QAction*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007faf5d0fe752 in KToolBar::contextMenuEvent(QContextMenuEvent*) () from /usr/lib/libkdeui.so.5
#14 0x00007faf5dda7664 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007faf5e1dbfbb in QToolBar::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#16 0x00007faf5dd57104 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#17 0x00007faf5dd5c43d in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#18 0x00007faf5d00a9a6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#19 0x00007faf5c8035fc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#20 0x00007faf5ddd47c8 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#21 0x00007faf5ddd362a in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007faf5ddfc592 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007faf5ba64a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007faf5ba65258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007faf5ba65429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007faf5c832b9f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#27 0x00007faf5ddfc21e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#28 0x00007faf5c8023e2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#29 0x00007faf5c802637 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#30 0x00007faf5c8076c7 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#31 0x00007faf5ebfe0d5 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kate.so
#32 0x00007faf5e87830d in __libc_start_main (main=0x400630, argc=1, ubp_av=0x7fff183a9e58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff183a9e48) at libc-start.c:226
#33 0x0000000000400661 in _start ()

Reported using DrKonqi