Bug 371884

Summary: kde froze when trying to open firefos
Product: [Unmaintained] plasma4 Reporter: Bo Milvang-Jensen <milvang>
Component: generalAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED UNMAINTAINED    
Severity: crash CC: bugtracking
Priority: NOR Keywords: drkonqi
Version: unspecified   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Bo Milvang-Jensen 2016-10-31 10:25:52 UTC 
Application: plasma-desktop (4.11.14)
KDE Platform Version: 4.14.13
Qt Version: 4.8.6
Operating System: Linux 3.13.0-95-generic x86_64
Distribution: Ubuntu 14.04.5 LTS

-- Information about the crash:
I was trying to open one of many firefox winows using the "taskbar" (is that the name?)

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe4b23ec800 (LWP 2712))]

Thread 4 (Thread 0x7fe48725a700 (LWP 2714)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe4ab0a4ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fe4ab0a5039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fe4a5c1d184 in start_thread (arg=0x7fe48725a700) at pthread_create.c:312
#4  0x00007fe4b1ce037d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fe3fced9700 (LWP 2715)):
#0  0x00007fe4a554d61d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe4a554d979 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe4a550b699 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4a550bf03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe4a550c0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe4ae8ba7be in QEventDispatcherGlib::processEvents (this=0x7fe3f80008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fe4ae88c0af in QEventLoop::processEvents (this=this@entry=0x7fe3fced8da0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fe4ae88c3a5 in QEventLoop::exec (this=this@entry=0x7fe3fced8da0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fe4ae788c5f in QThread::exec (this=this@entry=0x340d370) at thread/qthread.cpp:537
#9  0x00007fe4ae86d823 in QInotifyFileSystemWatcherEngine::run (this=0x340d370) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007fe4ae78b32f in QThreadPrivate::start (arg=0x340d370) at thread/qthread_unix.cpp:349
#11 0x00007fe4a5c1d184 in start_thread (arg=0x7fe3fced9700) at pthread_create.c:312
#12 0x00007fe4b1ce037d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fe3f7987700 (LWP 2716)):
#0  0x00007fe4b1cd16cd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe4a08e5f45 in ?? () from /usr/lib/nvidia-340/tls/libnvidia-tls.so.340.96
#2  0x00007fe4a554cc10 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4a550bb14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe4a550bf7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe4a550c0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fe4ae8ba7be in QEventDispatcherGlib::processEvents (this=0x7fe3f00008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#7  0x00007fe4ae88c0af in QEventLoop::processEvents (this=this@entry=0x7fe3f7986da0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007fe4ae88c3a5 in QEventLoop::exec (this=this@entry=0x7fe3f7986da0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007fe4ae788c5f in QThread::exec (this=this@entry=0x288dc30) at thread/qthread.cpp:537
#10 0x00007fe4ae86d823 in QInotifyFileSystemWatcherEngine::run (this=0x288dc30) at io/qfilesystemwatcher_inotify.cpp:265
#11 0x00007fe4ae78b32f in QThreadPrivate::start (arg=0x288dc30) at thread/qthread_unix.cpp:349
#12 0x00007fe4a5c1d184 in start_thread (arg=0x7fe3f7987700) at pthread_create.c:312
#13 0x00007fe4b1ce037d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fe4b23ec800 (LWP 2712)):
[KCrash Handler]
#6  size (this=0xf2e66ffffff6ae9) at ../../include/QtCore/../../src/corelib/tools/qlist.h:98
#7  size (this=0xf2e66ffffff6ae9) at ../../include/QtCore/../../src/corelib/tools/qlist.h:137
#8  QObjectPrivate::_q_reregisterTimers (this=0xc024830, pointer=0xf2e66ffffff6ae9) at kernel/qobject.cpp:1525
#9  0x00007fe4ae8a6b2a in QObject::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qobject.cpp:73
#10 0x00007fe4ae8a6c3d in QObject::qt_metacall (this=<optimized out>, _c=<optimized out>, _id=3, _a=<optimized out>) at .moc/release-shared/moc_qobject.cpp:111
#11 0x00007fe4ab117155 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#12 0x00007fe4ae8a1a78 in QMetaObject::activate (sender=0xc13c8f0, m=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3569
#13 0x00007fe4ae8a2223 in QMetaObject::activate (sender=<optimized out>, signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3626
#14 0x00007fe4b04d907e in QDeclarativeVMEMetaObject::metaCall (this=0xbd80600, c=QMetaObject::WriteProperty, _id=<optimized out>, a=0x7ffc1ad076e0) at qml/qdeclarativevmemetaobject.cpp:564
#15 0x00007fe4b04f4c37 in QDeclarativePropertyPrivate::write (object=0xc13c8f0, property=..., value=..., context=<optimized out>, flags=...) at qml/qdeclarativeproperty.cpp:1152
#16 0x00007fe4b04f545c in QDeclarativePropertyPrivate::writeValueProperty (this=0xbd60580, value=..., flags=...) at qml/qdeclarativeproperty.cpp:1088
#17 0x00007fe4b04f5512 in QDeclarativePropertyPrivate::write (that=..., value=..., flags=...) at qml/qdeclarativeproperty.cpp:1343
#18 0x00007fe4b04ef277 in QDeclarativeBinding::update (this=0xbef9370, flags=...) at qml/qdeclarativebinding.cpp:427
#19 0x00007fe4b04ee0db in update (this=<optimized out>) at ../../include/QtDeclarative/private/../../../src/declarative/qml/qdeclarativebinding_p.h:208
#20 QDeclarativeBindingPrivate::emitValueChanged (this=<optimized out>) at qml/qdeclarativebinding.cpp:469
#21 0x00007fe4b04ede63 in QDeclarativeExpression::qt_metacall (this=this@entry=0xbef9370, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7ffc1ad07ad0) at .moc/release-shared/moc_qdeclarativeexpression.cpp:93
#22 0x00007fe4b05e4fd0 in QDeclarativeBinding::qt_metacall (this=0xbef9370, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativebinding_p.cpp:85
#23 0x00007fe4ae8a1a78 in QMetaObject::activate (sender=0xb1cf820, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3569
#24 0x00007fe4b0482334 in QDeclarativeItem::setImplicitWidth (this=this@entry=0xb1cf820, w=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:3469
#25 0x00007fe4884398ae in TextLabel::updateImplicitSize (this=0xb1cf820) at ../../../../../plasma/desktop/applets/tasks/support/textlabel.cpp:95
#26 0x00007fe488439c19 in TextLabel::setText (this=this@entry=0xb1cf820, text=...) at ../../../../../plasma/desktop/applets/tasks/support/textlabel.cpp:69
#27 0x00007fe488433398 in TextLabel::qt_metacall (this=0xb1cf820, _c=QMetaObject::WriteProperty, _id=1, _a=0x7ffc1ad07d70) at moc_textlabel.cpp:109
#28 0x00007fe4b04f4c37 in QDeclarativePropertyPrivate::write (object=0xb1cf820, property=..., value=..., context=<optimized out>, flags=...) at qml/qdeclarativeproperty.cpp:1152
#29 0x00007fe4b04f545c in QDeclarativePropertyPrivate::writeValueProperty (this=0xbd4f2e0, value=..., flags=...) at qml/qdeclarativeproperty.cpp:1088
#30 0x00007fe4b04f5512 in QDeclarativePropertyPrivate::write (that=..., value=..., flags=...) at qml/qdeclarativeproperty.cpp:1343
#31 0x00007fe4b04ef277 in QDeclarativeBinding::update (this=0xbd4f360, flags=...) at qml/qdeclarativebinding.cpp:427
#32 0x00007fe4b04ee0db in update (this=<optimized out>) at ../../include/QtDeclarative/private/../../../src/declarative/qml/qdeclarativebinding_p.h:208
#33 QDeclarativeBindingPrivate::emitValueChanged (this=<optimized out>) at qml/qdeclarativebinding.cpp:469
#34 0x00007fe4b04ede63 in QDeclarativeExpression::qt_metacall (this=this@entry=0xbd4f360, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7ffc1ad08160) at .moc/release-shared/moc_qdeclarativeexpression.cpp:93
#35 0x00007fe4b05e4fd0 in QDeclarativeBinding::qt_metacall (this=0xbd4f360, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativebinding_p.cpp:85
#36 0x00007fe4ae8a1a78 in QMetaObject::activate (sender=0x9c33870, m=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3569
#37 0x00007fe4ae8a2223 in QMetaObject::activate (sender=<optimized out>, signal_index=<optimized out>, argv=argv@entry=0x0) at kernel/qobject.cpp:3626
#38 0x00007fe4b042b4c1 in QDeclarativeOpenMetaObject::setValue (this=0xca9b6c0, id=id@entry=4, value=...) at util/qdeclarativeopenmetaobject.cpp:261
#39 0x00007fe4b04b66f2 in setValue (val=..., id=4, this=0x9c33870) at graphicsitems/qdeclarativevisualitemmodel.cpp:469
#40 QDeclarativeVisualDataModel::_q_itemsChanged (this=0x2c7be30, index=0, count=44, roles=...) at graphicsitems/qdeclarativevisualitemmodel.cpp:1226
#41 0x00007fe4b05e17ed in QDeclarativeVisualDataModel::qt_static_metacall (_o=0xc024830, _c=4294929129, _id=3, _a=0x7ffc1ad074e0) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:406
#42 0x00007fe4ae8a187a in QMetaObject::activate (sender=sender@entry=0x2b858e0, m=m@entry=0x7fe4aebf16a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#43 0x00007fe4ae8eb5a3 in QAbstractItemModel::layoutChanged (this=this@entry=0x2b858e0) at .moc/release-shared/moc_qabstractitemmodel.cpp:176
#44 0x00007fe4ae886a89 in QAbstractItemModel::endMoveRows (this=0x2b858e0) at kernel/qabstractitemmodel.cpp:2673
#45 0x00007fe4888a7cac in itemMoved (item=<optimized out>, this=<optimized out>) at ../../../libs/taskmanager/tasksmodel.cpp:524
#46 TaskManager::TasksModel::qt_static_metacall (_o=0xc024830, _id=-38167, _a=0x7ffc1ad08700, _c=<optimized out>) at ./tasksmodel.moc:135
#47 0x00007fe4ae8a187a in QMetaObject::activate (sender=sender@entry=0x2b84b70, m=m@entry=0x7fe488ac41e0 <TaskManager::TaskGroup::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7ffc1ad08700) at kernel/qobject.cpp:3539
#48 0x00007fe48889aa62 in TaskManager::TaskGroup::itemPositionChanged (this=this@entry=0x2b84b70, _t1=_t1@entry=0xb59aa10) at ./taskgroup.moc:220
#49 0x00007fe48889d659 in TaskManager::TaskGroup::moveItem (this=0x2b84b70, oldIndex=oldIndex@entry=12, newIndex=newIndex@entry=5) at ../../../libs/taskmanager/taskgroup.cpp:707
#50 0x00007fe48887dc9a in TaskManager::AbstractSortingStrategy::check (this=<optimized out>, itemToCheck=<optimized out>) at ../../../libs/taskmanager/abstractsortingstrategy.cpp:148
#51 0x00007fe4888807ee in TaskManager::GroupManagerPrivate::addTask (this=this@entry=0x2b83ba0, task=task@entry=0xb454d70) at ../../../libs/taskmanager/groupmanager.cpp:360
#52 0x00007fe488881141 in TaskManager::GroupManagerPrivate::taskChanged (this=0x2b83ba0, task=0xb454d70, changes=...) at ../../../libs/taskmanager/groupmanager.cpp:589
#53 0x00007fe488884642 in TaskManager::GroupManager::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at ./groupmanager.moc:86
#54 0x00007fe4ae8a187a in QMetaObject::activate (sender=sender@entry=0x2b82bb0, m=m@entry=0x7fe488ac44c0 <TaskManager::TaskManager::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7ffc1ad089c0) at kernel/qobject.cpp:3539
#55 0x00007fe4888a3097 in TaskManager::TaskManager::windowChanged (this=this@entry=0x2b82bb0, _t1=0xb454d70, _t2=...) at ./taskmanager.moc:228
#56 0x00007fe4888a322b in TaskManager::TaskManager::taskChanged (this=0x2b82bb0, changes=...) at ../../../libs/taskmanager/taskmanager.cpp:387
#57 0x00007fe4888a52d1 in TaskManager::TaskManager::qt_static_metacall (_o=0xc024830, _id=-38167, _a=0x3, _c=<optimized out>) at ./taskmanager.moc:110
#58 0x00007fe4ae8a187a in QMetaObject::activate (sender=sender@entry=0xb454d70, m=m@entry=0x7fe488ac2060 <TaskManager::Task::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc1ad08ba0) at kernel/qobject.cpp:3539
#59 0x00007fe4888927f2 in TaskManager::Task::changed (this=this@entry=0xb454d70, _t1=...) at ./task.moc:238
#60 0x00007fe4888928ac in TaskManager::Task::setActive (this=this@entry=0xb454d70, a=a@entry=true) at ../../../libs/taskmanager/task.cpp:179
#61 0x00007fe4888a369c in TaskManager::TaskManager::activeWindowChanged (this=0x2b82bb0, w=<optimized out>) at ../../../libs/taskmanager/taskmanager.cpp:414
#62 0x00007fe4888a525c in TaskManager::TaskManager::qt_static_metacall (_o=0xc024830, _id=-38167, _a=0x3, _c=<optimized out>) at ./taskmanager.moc:105
#63 0x00007fe4ae8a187a in QMetaObject::activate (sender=sender@entry=0x2442060, m=m@entry=0x7fe4af9672a0 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffc1ad08d80) at kernel/qobject.cpp:3539
#64 0x00007fe4af66dac2 in KWindowSystem::activeWindowChanged (this=this@entry=0x2442060, _t1=56623536) at ./kwindowsystem.moc:156
#65 0x00007fe4af66ed48 in KWindowSystemPrivate::x11Event (this=0x242d790, ev=0x7ffc1ad08eb0) at ../../kdeui/windowmanagement/kwindowsystem_x11.cpp:197
#66 0x00007fe4af573928 in publicX11Event (e=0x7ffc1ad08eb0, this=<optimized out>) at ../../kdeui/kernel/ksystemeventfilter.cpp:43
#67 KSystemEventFilterPrivate::filterEvent (this=0x2468460, message=0x7ffc1ad08eb0) at ../../kdeui/kernel/ksystemeventfilter.cpp:102
#68 0x00007fe4ae87f35e in QAbstractEventDispatcher::filterEvent (this=0xc024830, message=0xf2e66ffffff6ae9, message@entry=0x7ffc1ad08eb0) at kernel/qabstracteventdispatcher.cpp:542
#69 0x00007fe4adcc8a60 in x11EventSourceDispatch (s=0x233cc30, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:143
#70 0x00007fe4a550be04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#71 0x00007fe4a550c048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#72 0x00007fe4a550c0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#73 0x00007fe4ae8ba7a1 in QEventDispatcherGlib::processEvents (this=0x22c66f0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#74 0x00007fe4adcc8be6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#75 0x00007fe4ae88c0af in QEventLoop::processEvents (this=this@entry=0x7ffc1ad09280, flags=...) at kernel/qeventloop.cpp:149
#76 0x00007fe4ae88c3a5 in QEventLoop::exec (this=this@entry=0x7ffc1ad09280, flags=...) at kernel/qeventloop.cpp:204
#77 0x00007fe4ae891b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#78 0x00007fe4adc2537c in QApplication::exec () at kernel/qapplication.cpp:3828
#79 0x00007fe4b1fe7624 in kdemain (argc=1, argv=0x7ffc1ad094d8) at ../../../../plasma/desktop/shell/main.cpp:126
#80 0x00007fe4b1c07f45 in __libc_start_main (main=0x4006f0 <main(int, char**)>, argc=1, argv=0x7ffc1ad094d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc1ad094c8) at libc-start.c:287
#81 0x000000000040071e in _start ()

Reported using DrKonqi
Comment 1 Kitsuna 2018-02-01 01:30:53 UTC 
Hi there, if i understand correctly you were attempting to open a new window in Firefox by right clicking on it in the task bar and selecting "new window" Is that correct? Or do you mean you were attempting to select an already open window from a list of windows? When did this problem start and how reliably can you reproduce it?
Comment 2 Bo Milvang-Jensen 2018-02-01 16:16:39 UTC 
Hi Kitsuna, thanks for asking. It's more than one year since I reported this crash and I don't remember the details, but from what I wrote I'd say: I clicked on the Firefox "icon" at the bottom of the screen in Kubuntu, which lists all the existing Firefox windows (say 20), and when I clicked on one of those listed Firefox windows to open it, I had the crash. I don't believe this has happened again.
Comment 3 Bo Milvang-Jensen 2018-02-01 16:19:55 UTC 
Hi again, I just found some notes about this incident, saying:
KDE crashed: I was trying to open Firefox when things (KDE) froze. After a few minutes things started working again and there was a KDE crash report window. I went along filing the crash report.
Comment 4 Nate Graham 2018-06-08 18:37:46 UTC 
Hello!

This bug report was filed for KDE Plasma 4, which reached end-of-support status in August 2015. KDE Plasma 5's desktop shell has been almost completely rewritten for better performance and usability, so it is likely that this bug has already been resolved in Plasma 5.

Accordingly, we hope you understand why we must close this bug report. If the issue described  here is still present in KDE Plasma 5.12 or later, please feel free to open a new ticket in the "plasmashell" product after reading https://community.kde.org/Get_Involved/Bug_Reporting

If you would like to get involved in KDE's bug triaging effort so that future mass bug closes like this are less likely, please read https://community.kde.org/Get_Involved#Bug_Triaging

Thanks for your understanding!

Nate Graham