The application crashes when closing a document.

Application: Kate (kate), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff2c011b780 (LWP 23823))]

Thread 2 (Thread 0x7ff29cf51700 (LWP 23824)):
#0  0x00007ff2be9e803f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ff2b321cfcb in ?? () from /usr/lib/libQtScript.so.4
#2  0x00007ff2b321d009 in ?? () from /usr/lib/libQtScript.so.4
#3  0x00007ff2be9e40a2 in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007ff2bd76843d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7ff2c011b780 (LWP 23823)):
[KCrash Handler]
#5  0x00007ff2bd6b83d9 in raise () from /usr/lib/libc.so.6
#6  0x00007ff2bd6b97d8 in abort () from /usr/lib/libc.so.6
#7  0x00007ff2ba882e3d in ?? () from /usr/lib/libglib-2.0.so.0
#8  0x00007ff2ba8a0227 in g_assertion_message () from /usr/lib/libglib-2.0.so.0
#9  0x00007ff2ba8a028a in g_assertion_message_expr () from /usr/lib/libglib-2.0.so.0
#10 0x00007ff2a3370689 in ?? () from /usr/lib/libinfinity-0.5.so.0
#11 0x00007ff2a2f0da3c in ?? () from /usr/lib/libinftext-0.5.so.0
#12 0x00007ff2b9efa6a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#13 0x00007ff2b9f0c03d in ?? () from /usr/lib/libgobject-2.0.so.0
#14 0x00007ff2b9f13d49 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#15 0x00007ff2b9f14002 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#16 0x00007ff2a3605fb6 in QInfinity::TextBuffer::eraseText(unsigned int, unsigned int, QInfinity::User*) () from /usr/local/lib/libqinfinity.so.3
#17 0x00007ff2a3d3844a in Kobby::KDocumentTextBuffer::localTextRemoved (this=0x26de620, document=<optimized out>, range=..., oldText=...) at /home/dan/Dev/KDE/kte-collaborative/common/document.cpp:386
#18 0x00007ff2bed88b48 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#19 0x00007ff2aa4333bc in KTextEditor::Document::textRemoved(KTextEditor::Document*, KTextEditor::Range const&, QString const&) () from /usr/lib/libktexteditor.so.4
#20 0x00007ff2a489bcf7 in KateDocument::closeUrl() () from /usr/lib/libkatepartinterfaces.so.4
#21 0x00007ff2aa6896a6 in ?? () from /usr/lib/libkateinterfaces.so.4
#22 0x00007ff29d8bcc2e in ?? () from /usr/lib/kde4/katetabifyplugin.so
#23 0x00007ff2bed88b48 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#24 0x00007ff2bfbf6c41 in KTabBar::closeRequest(int) () from /usr/lib/libkdeui.so.5
#25 0x00007ff2bed88b48 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#26 0x00007ff2be341461 in QTabBar::tabCloseRequested(int) () from /usr/lib/libQtGui.so.4
#27 0x00007ff2bed88b48 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#28 0x00007ff2be543ac2 in QAbstractButton::clicked(bool) () from /usr/lib/libQtGui.so.4
#29 0x00007ff2be2a8293 in ?? () from /usr/lib/libQtGui.so.4
#30 0x00007ff2be2a9403 in ?? () from /usr/lib/libQtGui.so.4
#31 0x00007ff2be2a94ec in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#32 0x00007ff2bdf4a67e in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007ff2bdefb12c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#34 0x00007ff2bdf0182d in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007ff2bfb2583a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#36 0x00007ff2bed74ebd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#37 0x00007ff2bdf00fe3 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/libQtGui.so.4
#38 0x00007ff2bdf72bfb in ?? () from /usr/lib/libQtGui.so.4
#39 0x00007ff2bdf7166c in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#40 0x00007ff2bdf981b2 in ?? () from /usr/lib/libQtGui.so.4
#41 0x00007ff2ba87c246 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0x00007ff2ba87c598 in ?? () from /usr/lib/libglib-2.0.so.0
#43 0x00007ff2ba87c63c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0x00007ff2beda1b46 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#45 0x00007ff2bdf98266 in ?? () from /usr/lib/libQtGui.so.4
#46 0x00007ff2bed73b1f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#47 0x00007ff2bed73e15 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#48 0x00007ff2bed78f4b in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#49 0x00007ff2aa8dcc75 in kdemain () from /usr/lib/libkdeinit4_kate.so
#50 0x0000000000408069 in _start ()

Reproducible: Sometimes