Version:            (using KDE 4.3.4)
Compiler:          gcc (GCC) 4.4.2 20091208 (prerelease) 
OS:                Linux
Installed from:    Unlisted Binary Package

Loaded plugins:
No plugins

How to reproduce:
Open KWrite and triple click on the text area.

Backtrace:

Application: KWrite (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  0xb27ecee5 in KateLineLayout::viewLineCount() const () from /usr/lib/kde4/katepart.so
#7  0xb27e9b5c in KateLayoutCache::viewLine(KTextEditor::Cursor const&) const () from /usr/lib/kde4/katepart.so
#8  0xb2842d87 in KateViewInternal::viewLineOffset(KTextEditor::Cursor const&, int, bool) () from /usr/lib/kde4/katepart.so
#9  0xb2846bd9 in KateViewInternal::makeVisible(KTextEditor::Cursor const&, int, bool, bool, bool) () from /usr/lib/kde4/katepart.so
#10 0xb2847020 in KateViewInternal::updateCursor(KTextEditor::Cursor const&, bool, bool, bool) () from /usr/lib/kde4/katepart.so
#11 0xb284b96c in KateViewInternal::mousePressEvent(QMouseEvent*) () from /usr/lib/kde4/katepart.so
#12 0xb626a1b6 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0xb6215924 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#14 0xb621d950 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#15 0xb6c5860a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#16 0xb76445bb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#17 0xb621c913 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#18 0xb628a404 in ?? () from /usr/lib/libQtGui.so.4
#19 0xb62898e5 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#20 0xb62b3fd2 in ?? () from /usr/lib/libQtGui.so.4
#21 0xb5e1c378 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb5e1fbf0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#23 0xb5e1fd23 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0xb766ed25 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0xb62b3705 in ?? () from /usr/lib/libQtGui.so.4
#26 0xb7642ba9 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#27 0xb7642ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#28 0xb764546f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#29 0xb62157a7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#30 0xb5187b60 in kdemain () from /usr/lib/libkdeinit4_kwrite.so
#31 0x0804de42 in _start ()