Bug 330369

Application: muon-discover (2.1.2)
KDE Platform Version: 4.12.0
Qt Version: 4.8.4
Operating System: Linux 3.11.0-15-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:

After searching for an application, pressed the back button to return to the start page. Muon hanged for a few minutes and then crashed.

Muon discovery is also hanging some minutes when opening and navigating between pages / results / application details.

-- Backtrace:
Application: Muon Discover (muon-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5cf1d797c0 (LWP 14981))]

Thread 7 (Thread 0x7f5cd6fa5700 (LWP 14982)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5ceb56506b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f5ceb5650a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f5ce7729f6e in start_thread (arg=0x7f5cd6fa5700) at pthread_create.c:311
#4  0x00007f5ceea4d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7f5c55bd0700 (LWP 14983)):
#0  0x00007f5ceea40f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5ce72516a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ce72517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5cef1c6a76 in QEventDispatcherGlib::processEvents (this=0x7f5c500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f5cef1985ef in QEventLoop::processEvents (this=this@entry=0x7f5c55bcfd70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5cef1988e5 in QEventLoop::exec (this=this@entry=0x7f5c55bcfd70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f5cef09788f in QThread::exec (this=this@entry=0x1795d30) at thread/qthread.cpp:542
#7  0x00007f5cef179d13 in QInotifyFileSystemWatcherEngine::run (this=0x1795d30) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f5cef099f2f in QThreadPrivate::start (arg=0x1795d30) at thread/qthread_unix.cpp:338
#9  0x00007f5ce7729f6e in start_thread (arg=0x7f5c55bd0700) at pthread_create.c:311
#10 0x00007f5ceea4d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f5c4af86700 (LWP 14984)):
#0  0x00007f5ceea40f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5ce72516a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ce72517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5cef1c6a76 in QEventDispatcherGlib::processEvents (this=0x7f5c440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f5cef1985ef in QEventLoop::processEvents (this=this@entry=0x7f5c4af85db0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5cef1988e5 in QEventLoop::exec (this=this@entry=0x7f5c4af85db0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f5cef09788f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f5cef099f2f in QThreadPrivate::start (arg=0x186a730) at thread/qthread_unix.cpp:338
#8  0x00007f5ce7729f6e in start_thread (arg=0x7f5c4af86700) at pthread_create.c:311
#9  0x00007f5ceea4d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f5c49f1c700 (LWP 14985)):
#0  0x00007f5ceea40f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5ce72516a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ce72517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5cef1c6a76 in QEventDispatcherGlib::processEvents (this=0x7f5c3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f5cef1985ef in QEventLoop::processEvents (this=this@entry=0x7f5c49f1bdb0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5cef1988e5 in QEventLoop::exec (this=this@entry=0x7f5c49f1bdb0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f5cef09788f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f5cef099f2f in QThreadPrivate::start (arg=0x1c232f0) at thread/qthread_unix.cpp:338
#8  0x00007f5ce7729f6e in start_thread (arg=0x7f5c49f1c700) at pthread_create.c:311
#9  0x00007f5ceea4d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f5c4971b700 (LWP 15561)):
#0  0x00007f5ce72910ea in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5ce72913c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ce72515b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ce72517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5cef1c6a76 in QEventDispatcherGlib::processEvents (this=0x7f5c40b81b40, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f5cef1985ef in QEventLoop::processEvents (this=this@entry=0x7f5c4971ad90, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f5cef1988e5 in QEventLoop::exec (this=this@entry=0x7f5c4971ad90, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f5cef09788f in QThread::exec (this=this@entry=0x4d94330) at thread/qthread.cpp:542
#8  0x00007f5cf0dbb19e in QDeclarativePixmapReader::run (this=0x4d94330) at util/qdeclarativepixmapcache.cpp:576
#9  0x00007f5cef099f2f in QThreadPrivate::start (arg=0x4d94330) at thread/qthread_unix.cpp:338
#10 0x00007f5ce7729f6e in start_thread (arg=0x7f5c4971b700) at pthread_create.c:311
#11 0x00007f5ceea4d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f5c38b7f700 (LWP 15562)):
#0  0x00007f5ce772d05f in __pthread_mutex_unlock_usercnt (mutex=0x7f5c2c000a60, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  0x00007f5ce72913d1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ce7250d40 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ce72515c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5ce72517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5cef1c6a76 in QEventDispatcherGlib::processEvents (this=0x7f5c2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f5cef1985ef in QEventLoop::processEvents (this=this@entry=0x7f5c38b7edb0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f5cef1988e5 in QEventLoop::exec (this=this@entry=0x7f5c38b7edb0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f5cef09788f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f5cef099f2f in QThreadPrivate::start (arg=0x7f5c40ba00b0) at thread/qthread_unix.cpp:338
#10 0x00007f5ce7729f6e in start_thread (arg=0x7f5c38b7f700) at pthread_create.c:311
#11 0x00007f5ceea4d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f5cf1d797c0 (LWP 14981)):
[KCrash Handler]
#6  QDeclarativeError::isValid (this=0xa8) at qml/qdeclarativeerror.cpp:138
#7  0x00007f5cf0e72010 in QDeclarativeExpression::hasError (this=<optimized out>) at qml/qdeclarativeexpression.cpp:769
#8  0x00007f5cf0eac54b in QDeclarativeBoundSignal::qt_metacall (this=0x3fb6ef0, c=<optimized out>, id=<optimized out>, a=0x7fffa038cfc0) at qml/qdeclarativeboundsignal.cpp:200
#9  0x00007f5cef1adc52 in QMetaObject::activate (sender=sender@entry=0x3ecf340, m=m@entry=0x7f5cf1257900 <QDeclarativeMouseArea::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fffa038cfc0) at kernel/qobject.cpp:3558
#10 0x00007f5cf0f60bc2 in QDeclarativeMouseArea::clicked (this=this@entry=0x3ecf340, _t1=_t1@entry=0x7fffa038cff0) at .moc/release-shared/moc_qdeclarativemousearea_p.cpp:523
#11 0x00007f5cf0e15ca6 in QDeclarativeMouseArea::setPressed (this=this@entry=0x3ecf340, p=p@entry=false) at graphicsitems/qdeclarativemousearea.cpp:936
#12 0x00007f5cf0e16d46 in QDeclarativeMouseArea::mouseReleaseEvent (this=0x3ecf340, event=0x7fffa038d510) at graphicsitems/qdeclarativemousearea.cpp:586
#13 0x00007f5cf0133b02 in QGraphicsItem::sceneEvent (this=this@entry=0x3ecf350, event=event@entry=0x7fffa038d510) at graphicsview/qgraphicsitem.cpp:6742
#14 0x00007f5cf0e09a54 in QDeclarativeItem::sceneEvent (this=this@entry=0x3ecf340, event=event@entry=0x7fffa038d510) at graphicsitems/qdeclarativeitem.cpp:3049
#15 0x00007f5cf0e174b1 in QDeclarativeMouseArea::sceneEvent (this=0x3ecf340, event=0x7fffa038d510) at graphicsitems/qdeclarativemousearea.cpp:681
#16 0x00007f5cf015ab3f in QGraphicsScenePrivate::sendMouseEvent (this=0x18f5be0, mouseEvent=0x7fffa038d510) at graphicsview/qgraphicsscene.cpp:1295
#17 0x00007f5cf016379f in QGraphicsScene::mouseReleaseEvent (this=<optimized out>, mouseEvent=0x7fffa038d510) at graphicsview/qgraphicsscene.cpp:4128
#18 0x00007f5cf016f710 in QGraphicsScene::event (this=0x18e7070, event=0x7fffa038d510) at graphicsview/qgraphicsscene.cpp:3458
#19 0x00007f5cefb8adfc in QApplicationPrivate::notify_helper (this=this@entry=0x16eee00, receiver=receiver@entry=0x18e7070, e=e@entry=0x7fffa038d510) at kernel/qapplication.cpp:4567
#20 0x00007f5cefb91470 in QApplication::notify (this=this@entry=0x7fffa038e2c0, receiver=receiver@entry=0x18e7070, e=e@entry=0x7fffa038d510) at kernel/qapplication.cpp:4353
#21 0x00007f5cf0894c6a in KApplication::notify (this=0x7fffa038e2c0, receiver=0x18e7070, event=0x7fffa038d510) at ../../kdeui/kernel/kapplication.cpp:311
#22 0x00007f5cef1998bd in QCoreApplication::notifyInternal (this=0x7fffa038e2c0, receiver=0x18e7070, event=event@entry=0x7fffa038d510) at kernel/qcoreapplication.cpp:946
#23 0x00007f5cefb89526 in sendSpontaneousEvent (event=event@entry=0x7fffa038d510, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#24 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fffa038d510) at kernel/qapplication.cpp:5565
#25 0x00007f5cf01863e7 in QGraphicsView::mouseReleaseEvent (this=0x1887050, event=0x7fffa038da70) at graphicsview/qgraphicsview.cpp:3338
#26 0x00007f5cefbda31e in QWidget::event (this=this@entry=0x1887050, event=event@entry=0x7fffa038da70) at kernel/qwidget.cpp:8375
#27 0x00007f5ceff7b5be in QFrame::event (this=0x1887050, e=0x7fffa038da70) at widgets/qframe.cpp:557
#28 0x00007f5cf0186e09 in QGraphicsView::viewportEvent (this=0x1887050, event=0x7fffa038da70) at graphicsview/qgraphicsview.cpp:2866
#29 0x00007f5cef199a26 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x16eee00, receiver=receiver@entry=0x1887840, event=event@entry=0x7fffa038da70) at kernel/qcoreapplication.cpp:1056
#30 0x00007f5cefb8addc in QApplicationPrivate::notify_helper (this=this@entry=0x16eee00, receiver=receiver@entry=0x1887840, e=e@entry=0x7fffa038da70) at kernel/qapplication.cpp:4563
#31 0x00007f5cefb915ad in QApplication::notify (this=this@entry=0x7fffa038e2c0, receiver=receiver@entry=0x1887840, e=e@entry=0x7fffa038da70) at kernel/qapplication.cpp:4110
#32 0x00007f5cf0894c6a in KApplication::notify (this=0x7fffa038e2c0, receiver=0x1887840, event=0x7fffa038da70) at ../../kdeui/kernel/kapplication.cpp:311
#33 0x00007f5cef1998bd in QCoreApplication::notifyInternal (this=0x7fffa038e2c0, receiver=receiver@entry=0x1887840, event=event@entry=0x7fffa038da70) at kernel/qcoreapplication.cpp:946
#34 0x00007f5cefb90d63 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#35 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x1887840, event=event@entry=0x7fffa038da70, alienWidget=alienWidget@entry=0x1887840, nativeWidget=nativeWidget@entry=0x1887050, buttonDown=buttonDown@entry=0x7f5cf066f2f8 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#36 0x00007f5cefc057db in QETWidget::translateMouseEvent (this=this@entry=0x1887050, event=event@entry=0x7fffa038ddf0) at kernel/qapplication_x11.cpp:4631
#37 0x00007f5cefc05079 in QApplication::x11ProcessEvent (this=0x7fffa038e2c0, event=event@entry=0x7fffa038ddf0) at kernel/qapplication_x11.cpp:3624
#38 0x00007f5cefc2c922 in x11EventSourceDispatch (s=0x16ef800, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#39 0x00007f5ce72513b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f5ce7251708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f5ce72517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007f5cef1c6a55 in QEventDispatcherGlib::processEvents (this=0x16a2ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#43 0x00007f5cefc2c9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#44 0x00007f5cef1985ef in QEventLoop::processEvents (this=this@entry=0x7fffa038e1d0, flags=...) at kernel/qeventloop.cpp:149
#45 0x00007f5cef1988e5 in QEventLoop::exec (this=this@entry=0x7fffa038e1d0, flags=...) at kernel/qeventloop.cpp:204
#46 0x00007f5cef19de5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#47 0x00007f5cefb8934c in QApplication::exec () at kernel/qapplication.cpp:3828
#48 0x000000000040b4dc in main (argc=1, argv=0x7fffa038e418) at /build/buildd/muon-2.1.2/discover/main.cpp:86

Reported using DrKonqi