Application: lancelot (1.9.5)
KDE Platform Version: 4.13.0
Qt Version: 4.8.6
Operating System: Linux 3.13.0-27-generic x86_64
Distribution: nOS Infinity

-- Information about the crash:
This bug was reportedly fixed previously but it appears to be occuring again. When I add an application to the favourites (right-click, add to favourites) the menu crashes. More often than not the application will not be added to the menu

Output of apt-cache show plasma-widget-lancelot:
Package: plasma-widget-lancelot                                                                                                                              
Priority: optional                                                                                                                                           
Section: universe/kde                                                                                                                                        
Installed-Size: 1885                                                                                                                                         
Maintainer: Kubuntu Developers <kubuntu-devel@lists.ubuntu.com>                                                                                              
Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>                                                                              
Architecture: amd64                                                                                                                                          
Source: kdeplasma-addons                                                                                                                                     
Version: 4:4.13.0-0ubuntu1                                                                                                                                   
Replaces: plasma-applet-lancelot                                                                                                                             
Depends: kde-runtime, kdepim-runtime, libakonadi-kde4 (>= 4:4.13.0), libc6 (>= 2.14), libkcmutils4 (>= 4:4.4.95), libkdecore5 (>= 4:4.5.85), libkdeui5 (>= 4:4.3.4), libkfile4 (>= 4:4.3.4), libkio5 (>= 4:4.3.4), libkworkspace4abi2 (>= 4:4.8.1), libplasma3 (>= 4:4.5.90), libqt4-dbus (>= 4:4.6.1), libqtcore4 (>= 4:4.8.0), libqtgui4 (>= 4:4.6.2), libsolid4 (>= 4:4.3.4), libstdc++6 (>= 4.1.1), libtaskmanager4abi5 (>= 4:4.10.90), libx11-6, libxrender1
Conflicts: plasma-applet-lancelot
Filename: pool/universe/k/kdeplasma-addons/plasma-widget-lancelot_4.13.0-0ubuntu1_amd64.deb
Size: 511232
MD5sum: cada8e306463da9d4d671b0381000e30
SHA1: c16e792a2fa0765e8363516a00f38482bc3e482c
SHA256: 78acb67fa8835adbf68027ee8dac52a8953b8ad324a4ece78b12d1e264d6e5ce
Description-en: lancelot widget for Plasma
 Lancelot is an application launcher menu (or ALI) for Plasma designed to
 provide a place from which all your jobs begin. It provides quick access
 to applications, places, documents, contacts and system information.
 .
 This package is part of the KDE Plasma addons module.
Description-md5: aa8d740002cf88fbb2bdf6ebccb65bb2
Homepage: http://plasma.kde.org/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 5y
Task: kubuntu-full, kubuntu-active-full

- What I was doing when the application crashed:

I was adding an application to the favourites on the lanceleot menu

The crash can be reproduced every time.

-- Backtrace:
Application: Lancelot (lancelot), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1d39f02800 (LWP 3182))]

Thread 2 (Thread 0x7f1d10ed8700 (LWP 3183)):
#0  0x00007f1d36260fbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f1d2d9edfe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1d2d9ee0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1d369e77be in QEventDispatcherGlib::processEvents (this=0x7f1d0c0008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f1d369b90af in QEventLoop::processEvents (this=this@entry=0x7f1d10ed7da0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1d369b93a5 in QEventLoop::exec (this=this@entry=0x7f1d10ed7da0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1d368b5c5f in QThread::exec (this=this@entry=0x1f09d10) at thread/qthread.cpp:537
#7  0x00007f1d3699a823 in QInotifyFileSystemWatcherEngine::run (this=0x1f09d10) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f1d368b832f in QThreadPrivate::start (arg=0x1f09d10) at thread/qthread_unix.cpp:349
#9  0x00007f1d2e30e182 in start_thread (arg=0x7f1d10ed8700) at pthread_create.c:312
#10 0x00007f1d3626e30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f1d39f02800 (LWP 3182)):
[KCrash Handler]
#6  QString (other=..., this=<optimized out>) at /usr/include/qt4/QtCore/qstring.h:725
#7  Lancelot::Models::Applications::contextActivate (this=0x1e74b70, index=258362611, context=0x1eccddf4) at ../../../libs/lancelot-datamodels/Applications.cpp:310
#8  0x00007f1d38f2cd64 in Lancelot::ActionListViewItemFactory::itemContext (this=0x2bab780, sender=sender@entry=0x2e42aa0, mouseCoordinate=<optimized out>, mouseCoordinate@entry=true) at ../../../libs/lancelot/widgets/ActionListView.cpp:621
#9  0x00007f1d38f2ce76 in Lancelot::ActionListViewItem::contextMenuEvent (this=0x2e42aa0, event=0x7fffcce1dcc0) at ../../../libs/lancelot/widgets/ActionListView.cpp:109
#10 0x00007f1d377105b5 in QGraphicsItem::sceneEvent (this=0x2e42ab0, event=0x7fffcce1dcc0) at graphicsview/qgraphicsitem.cpp:6725
#11 0x00007f1d3773770a in QGraphicsScene::contextMenuEvent (this=<optimized out>, contextMenuEvent=0x7fffcce1dcc0) at graphicsview/qgraphicsscene.cpp:3617
#12 0x00007f1d3774c1d5 in QGraphicsScene::event (this=0x1c78ec0, event=0x7fffcce1dcc0) at graphicsview/qgraphicsscene.cpp:3412
#13 0x00007f1d37166e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1b0c0a0, receiver=receiver@entry=0x1c78ec0, e=e@entry=0x7fffcce1dcc0) at kernel/qapplication.cpp:4567
#14 0x00007f1d3716d4a0 in QApplication::notify (this=this@entry=0x1ae0800, receiver=receiver@entry=0x1c78ec0, e=e@entry=0x7fffcce1dcc0) at kernel/qapplication.cpp:4353
#15 0x00007f1d38332baa in KApplication::notify (this=0x1ae0800, receiver=0x1c78ec0, event=0x7fffcce1dcc0) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007f1d369ba4dd in QCoreApplication::notifyInternal (this=0x1ae0800, receiver=0x1c78ec0, event=event@entry=0x7fffcce1dcc0) at kernel/qcoreapplication.cpp:953
#17 0x00007f1d37763d07 in sendEvent (event=0x7fffcce1dcc0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 QGraphicsView::contextMenuEvent (this=0x1c7a6c0, event=0x7fffcce1e190) at graphicsview/qgraphicsview.cpp:2892
#19 0x00007f1d371b67d2 in QWidget::event (this=this@entry=0x1c7a6c0, event=event@entry=0x7fffcce1e190) at kernel/qwidget.cpp:8554
#20 0x00007f1d37557fce in QFrame::event (this=0x1c7a6c0, e=0x7fffcce1e190) at widgets/qframe.cpp:557
#21 0x00007f1d377637b9 in QGraphicsView::viewportEvent (this=0x1c7a6c0, event=0x7fffcce1e190) at graphicsview/qgraphicsview.cpp:2866
#22 0x00007f1d369ba646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1b0c0a0, receiver=receiver@entry=0x1c387a0, event=event@entry=0x7fffcce1e190) at kernel/qcoreapplication.cpp:1063
#23 0x00007f1d37166e0c in QApplicationPrivate::notify_helper (this=this@entry=0x1b0c0a0, receiver=receiver@entry=0x1c387a0, e=e@entry=0x7fffcce1e190) at kernel/qapplication.cpp:4563
#24 0x00007f1d3716e1f8 in QApplication::notify (this=this@entry=0x1ae0800, receiver=receiver@entry=0x1c387a0, e=e@entry=0x7fffcce1e190) at kernel/qapplication.cpp:4189
#25 0x00007f1d38332baa in KApplication::notify (this=0x1ae0800, receiver=0x1c387a0, event=0x7fffcce1e190) at ../../kdeui/kernel/kapplication.cpp:311
#26 0x00007f1d369ba4dd in QCoreApplication::notifyInternal (this=0x1ae0800, receiver=receiver@entry=0x1c387a0, event=event@entry=0x7fffcce1e190) at kernel/qcoreapplication.cpp:953
#27 0x00007f1d371e1a20 in sendSpontaneousEvent (event=0x7fffcce1e190, receiver=0x1c387a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#28 QETWidget::translateMouseEvent (this=this@entry=0x1c7a6c0, event=event@entry=0x7fffcce1e4e0) at kernel/qapplication_x11.cpp:4639
#29 0x00007f1d371e1269 in QApplication::x11ProcessEvent (this=0x1ae0800, event=event@entry=0x7fffcce1e4e0) at kernel/qapplication_x11.cpp:3627
#30 0x00007f1d37208b02 in x11EventSourceDispatch (s=0x1afe0f0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#31 0x00007f1d2d9ede04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f1d2d9ee048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f1d2d9ee0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f1d369e77a1 in QEventDispatcherGlib::processEvents (this=0x1a4aaf0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#35 0x00007f1d37208bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007f1d369b90af in QEventLoop::processEvents (this=this@entry=0x7fffcce1e8b0, flags=...) at kernel/qeventloop.cpp:149
#37 0x00007f1d369b93a5 in QEventLoop::exec (this=this@entry=0x7fffcce1e8b0, flags=...) at kernel/qeventloop.cpp:204
#38 0x00007f1d369beb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#39 0x00007f1d3716537c in QApplication::exec () at kernel/qapplication.cpp:3828
#40 0x000000000040cde3 in LancelotApplication::main (argc=<optimized out>, argv=<optimized out>) at ../../../../applets/lancelot/application/LancelotApplication.cpp:113
#41 0x00007f1d36194ec5 in __libc_start_main (main=0x40cc90 <main(int, char**)>, argc=1, argv=0x7fffcce1ea18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffcce1ea08) at libc-start.c:287
#42 0x000000000040ce17 in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 259547.

Possible duplicates by query: bug 259547.

Reported using DrKonqi