Application: lancelot (1.9.5)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.0-4-amd64 x86_64
Distribution: Debian GNU/Linux 8.2 (jessie)

-- Information about the crash:
- What I was doing when the application crashed: trying to add iceweasel to the favourites in Lancelot

- Unusual behavior I noticed: the Lancelot menu could not be opened after a few tries to add iceweasel to the favourites

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 0x7f7100924800 (LWP 1171))]

Thread 2 (Thread 0x7f70d6617700 (LWP 1173)):
#0  0x00007f70fcb3750d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f70f3ec4ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f70f3ec4ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f70fd2c3d37 in QEventDispatcherGlib::processEvents (this=0x7f70d00008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f70fd293271 in QEventLoop::processEvents (this=this@entry=0x7f70d6616d80, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f70fd2935d5 in QEventLoop::exec (this=this@entry=0x7f70d6616d80, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f70fd187e99 in QThread::exec (this=this@entry=0x193aec0) at thread/qthread.cpp:538
#7  0x00007f70fd273ac3 in QInotifyFileSystemWatcherEngine::run (this=0x193aec0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f70fd18a70f in QThreadPrivate::start (arg=0x193aec0) at thread/qthread_unix.cpp:349
#9  0x00007f70f49f70a4 in start_thread (arg=0x7f70d6617700) at pthread_create.c:309
#10 0x00007f70fcb4004d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f7100924800 (LWP 1171)):
[KCrash Handler]
#6  size (this=<optimized out>) at /usr/include/qt4/QtCore/qlist.h:98
#7  size (this=<optimized out>) at /usr/include/qt4/QtCore/qlist.h:137
#8  Lancelot::Models::Applications::contextActivate (this=0x1, index=index@entry=3, context=0x26ce760) at ../../../libs/lancelot-datamodels/Applications.cpp:307
#9  0x00007f70ff8de0bc in Lancelot::ActionListViewItemFactory::itemContext (this=0x2492e70, sender=sender@entry=0x248a550, mouseCoordinate=<optimized out>, mouseCoordinate@entry=true) at ../../../libs/lancelot/widgets/ActionListView.cpp:621
#10 0x00007f70ff8de1d6 in Lancelot::ActionListViewItem::contextMenuEvent (this=0x248a550, event=0x7ffd97bf2e30) at ../../../libs/lancelot/widgets/ActionListView.cpp:109
#11 0x00007f70fe026db8 in QGraphicsItem::sceneEvent (this=0x248a560, event=0x7ffd97bf2e30) at graphicsview/qgraphicsitem.cpp:6725
#12 0x00007f70fe05004b in QGraphicsScene::contextMenuEvent (this=<optimized out>, contextMenuEvent=0x7ffd97bf2e30) at graphicsview/qgraphicsscene.cpp:3617
#13 0x00007f70fe06748c in QGraphicsScene::event (this=0x14e8090, event=0x7ffd97bf2e30) at graphicsview/qgraphicsscene.cpp:3412
#14 0x00007f70fda4148c in QApplicationPrivate::notify_helper (this=this@entry=0x1395f10, receiver=receiver@entry=0x14e8090, e=e@entry=0x7ffd97bf2e30) at kernel/qapplication.cpp:4570
#15 0x00007f70fda47fa8 in QApplication::notify (this=this@entry=0x13775b0, receiver=receiver@entry=0x14e8090, e=e@entry=0x7ffd97bf2e30) at kernel/qapplication.cpp:4356
#16 0x00007f70feca81aa in KApplication::notify (this=0x13775b0, receiver=0x14e8090, event=0x7ffd97bf2e30) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f70fd29471d in QCoreApplication::notifyInternal (this=0x13775b0, receiver=0x14e8090, event=event@entry=0x7ffd97bf2e30) at kernel/qcoreapplication.cpp:955
#18 0x00007f70fe0803f7 in sendEvent (event=0x7ffd97bf2e30, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QGraphicsView::contextMenuEvent (this=0x15128d0, event=0x7ffd97bf3370) at graphicsview/qgraphicsview.cpp:2892
#20 0x00007f70fda94748 in QWidget::event (this=0x15128d0, event=0x7ffd97bf3370) at kernel/qwidget.cpp:8775
#21 0x00007f70fde5683e in QFrame::event (this=0x15128d0, e=0x7ffd97bf3370) at widgets/qframe.cpp:557
#22 0x00007f70fe07fe81 in QGraphicsView::viewportEvent (this=0x15128d0, event=0x7ffd97bf3370) at graphicsview/qgraphicsview.cpp:2866
#23 0x00007f70fd294886 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1395f10, receiver=receiver@entry=0x151b890, event=event@entry=0x7ffd97bf3370) at kernel/qcoreapplication.cpp:1065
#24 0x00007f70fda4146c in QApplicationPrivate::notify_helper (this=this@entry=0x1395f10, receiver=receiver@entry=0x151b890, e=e@entry=0x7ffd97bf3370) at kernel/qapplication.cpp:4566
#25 0x00007f70fda49857 in QApplication::notify (this=this@entry=0x13775b0, receiver=receiver@entry=0x151b890, e=e@entry=0x7ffd97bf3370) at kernel/qapplication.cpp:4192
#26 0x00007f70feca81aa in KApplication::notify (this=0x13775b0, receiver=0x151b890, event=0x7ffd97bf3370) at ../../kdeui/kernel/kapplication.cpp:311
#27 0x00007f70fd29471d in QCoreApplication::notifyInternal (this=0x13775b0, receiver=receiver@entry=0x151b890, event=event@entry=0x7ffd97bf3370) at kernel/qcoreapplication.cpp:955
#28 0x00007f70fdabe49d in sendSpontaneousEvent (event=0x7ffd97bf3370, receiver=0x151b890) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#29 QETWidget::translateMouseEvent (this=this@entry=0x15128d0, event=event@entry=0x7ffd97bf36a0) at kernel/qapplication_x11.cpp:4545
#30 0x00007f70fdabce2c in QApplication::x11ProcessEvent (this=0x13775b0, event=event@entry=0x7ffd97bf36a0) at kernel/qapplication_x11.cpp:3663
#31 0x00007f70fdae5ed2 in x11EventSourceDispatch (s=0x138e0b0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#32 0x00007f70f3ec4c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f70f3ec4f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f70f3ec4ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f70fd2c3d1d in QEventDispatcherGlib::processEvents (this=0x12e2b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#36 0x00007f70fdae5f96 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#37 0x00007f70fd293271 in QEventLoop::processEvents (this=this@entry=0x7ffd97bf3a80, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007f70fd2935d5 in QEventLoop::exec (this=this@entry=0x7ffd97bf3a80, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007f70fd299059 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#40 0x00007f70fda3f92c in QApplication::exec () at kernel/qapplication.cpp:3828
#41 0x000000000040ce73 in LancelotApplication::main (argc=<optimized out>, argv=<optimized out>) at ../../../../applets/lancelot/application/LancelotApplication.cpp:113
#42 0x00007f70fca7bb45 in __libc_start_main (main=0x40cd10 <main(int, char**)>, argc=1, argv=0x7ffd97bf3bf8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd97bf3be8) at libc-start.c:287
#43 0x000000000040cebc in _start ()

Reported using DrKonqi