Version:            (using KDE 4.1.3)
OS:                Linux
Installed from:    Ubuntu Packages

To reproduce this bug, switch to block selection mode and put the cursor in any position that would be 'unreachable' in line selection mode. Now switch back to line selection and attempt to move the cursor using the arrow keys. On my system, this will invariably crash Kate.

/***/

Application: Kate (kate), signal SIGABRT
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7f9b422c66f0 (LWP 29483)]
[KCrash handler]
#5  0x00007f9b41b94fd5 in raise () from /lib/libc.so.6
#6  0x00007f9b41b96b43 in abort () from /lib/libc.so.6
#7  0x00007f9b4054d6b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f9b4054d7fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f9b371adc20 in KateViewInternal::moveChar (this=0xf839d0, 
    bias=KateViewInternal::left, sel=false)
    at /build/buildd/kde4libs-4.1.3/kate/view/kateviewinternal.cpp:792
#10 0x00007f9b37196165 in KateView::qt_metacall (this=0xd71740, 
    _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, 
    _a=0x7fff4a2f5e80)
    at /build/buildd/kde4libs-4.1.3/obj-x86_64-linux-gnu/kate/kateview.moc:334
#11 0x00007f9b40652134 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#12 0x00007f9b40f41f57 in QAction::triggered () from /usr/lib/libQtGui.so.4
#13 0x00007f9b40f42720 in QAction::activate () from /usr/lib/libQtGui.so.4
#14 0x00007f9b40f45d17 in QAction::event () from /usr/lib/libQtGui.so.4
#15 0x00007f9b40f9eb63 in QWidgetAction::event () from /usr/lib/libQtGui.so.4
#16 0x00007f9b40f47c3d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#17 0x00007f9b40f4f9ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0x00007f9b3ed1bfcb in KApplication::notify (this=0x7fff4a2f7a10, 
    receiver=0x10e93c0, event=0x7fff4a2f63a0)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#19 0x00007f9b4063dd61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#20 0x00007f9b40f7d20d in ?? () from /usr/lib/libQtGui.so.4
#21 0x00007f9b40f7eb3c in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007f9b40f509e2 in QApplication::notify () from /usr/lib/libQtGui.so.4
#23 0x00007f9b3ed1bfcb in KApplication::notify (this=0x7fff4a2f7a10, 
    receiver=0xf839d0, event=0x7fff4a2f68a0)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#24 0x00007f9b4063dd61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#25 0x00007f9b40fd65c4 in ?? () from /usr/lib/libQtGui.so.4
#26 0x00007f9b40fd88a7 in ?? () from /usr/lib/libQtGui.so.4
#27 0x00007f9b40fb2390 in QApplication::x11ProcessEvent ()
   from /usr/lib/libQtGui.so.4
#28 0x00007f9b40fda2c4 in ?? () from /usr/lib/libQtGui.so.4
#29 0x00007f9b3dbb0d3b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#30 0x00007f9b3dbb450d in ?? () from /usr/lib/libglib-2.0.so.0
#31 0x00007f9b3dbb46cb in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#32 0x00007f9b4066615f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#33 0x00007f9b40fd9a6f in ?? () from /usr/lib/libQtGui.so.4
#34 0x00007f9b4063c682 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#35 0x00007f9b4063c80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#36 0x00007f9b4063ecbd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#37 0x00007f9b41ed8d15 in kdemain () from /usr/lib/libkdeinit4_kate.so
#38 0x00007f9b41b80466 in __libc_start_main () from /lib/libc.so.6
#39 0x0000000000400659 in _start ()
#0  0x00007f9b41c0a5f0 in __nanosleep_nocancel () from /lib/libc.so.6