Bug 357791

Application: plasmashell (5.5.3)

Qt Version: 5.5.1
Operating System: Linux 4.3.0-5-generic x86_64
Distribution: Ubuntu Xenial Xerus (development branch)

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

I believe whenever I run "sudo apt-get update" in konsole it triggers the crash handler window popup. I am running Kubuntu 16.04 current (pre-alpha) with the Kubuntu Xenial Landing PPA enabled for Plasma 5.5.3 and friends.

One of the lines in the backtrace is:

#8  0x00007fa63428e4a9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/discover-notifier/MuonApplicationNotifier.so

When I went to install the debug symbols via the crash handler window it messaged that "Symbols not available for MuonApplicationNotifier.so" but it did install symbols for qt5base and plasma-desktop FYI.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa6f9f108c0 (LWP 7369))]

Thread 7 (Thread 0x7fa6e524d700 (LWP 7372)):
#0  0x00007fa6f460f83d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa6f86d9c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa6f86db8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa6e73964a9 in QXcbEventReader::run (this=0x17e3680) at qxcbconnection.cpp:1229
#4  0x00007fa6f4d0587e in QThreadPrivate::start (arg=0x17e3680) at thread/qthread_unix.cpp:331
#5  0x00007fa6f3df166a in start_thread (arg=0x7fa6e524d700) at pthread_create.c:333
#6  0x00007fa6f461ae4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fa6de8fd700 (LWP 7374)):
#0  0x00007fa6f460f83d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa6f13a430c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa6f13a441c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa6f4f3d2eb in QEventDispatcherGlib::processEvents (this=0x7fa6d80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fa6f4ee42fa in QEventLoop::exec (this=this@entry=0x7fa6de8fcce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fa6f4d008d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fa6f75abc85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa6f4d0587e in QThreadPrivate::start (arg=0x18a9540) at thread/qthread_unix.cpp:331
#8  0x00007fa6f3df166a in start_thread (arg=0x7fa6de8fd700) at pthread_create.c:333
#9  0x00007fa6f461ae4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fa6cfb63700 (LWP 7375)):
#0  0x00007fa6f460f83d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa6f13a430c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa6f13a441c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa6f4f3d2eb in QEventDispatcherGlib::processEvents (this=0x7fa6c80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fa6f4ee42fa in QEventLoop::exec (this=this@entry=0x7fa6cfb62ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fa6f4d008d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fa6f75abc85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa6f4d0587e in QThreadPrivate::start (arg=0x1ae9770) at thread/qthread_unix.cpp:331
#8  0x00007fa6f3df166a in start_thread (arg=0x7fa6cfb63700) at pthread_create.c:333
#9  0x00007fa6f461ae4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fa6cdcb1700 (LWP 7376)):
#0  0x00007fa6f460f83d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa6f13a430c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa6f13a441c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa6f4f3d2eb in QEventDispatcherGlib::processEvents (this=0x7fa6c00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fa6f4ee42fa in QEventLoop::exec (this=this@entry=0x7fa6cdcb0ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fa6f4d008d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fa6f75abc85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa6f4d0587e in QThreadPrivate::start (arg=0x1c00b30) at thread/qthread_unix.cpp:331
#8  0x00007fa6f3df166a in start_thread (arg=0x7fa6cdcb1700) at pthread_create.c:333
#9  0x00007fa6f461ae4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fa6c7fff700 (LWP 7377)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa6f9952bd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fa6f9952c19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fa6f3df166a in start_thread (arg=0x7fa6c7fff700) at pthread_create.c:333
#4  0x00007fa6f461ae4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fa63509f700 (LWP 7382)):
#0  __libc_disable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:98
#1  0x00007fa6f460b409 in read () at ../sysdeps/unix/syscall-template.S:81
#2  0x00007fa6f13e7680 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa6f13a3df4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa6f13a42b0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa6f13a441c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fa6f4f3d2eb in QEventDispatcherGlib::processEvents (this=0x7fa6300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#7  0x00007fa6f4ee42fa in QEventLoop::exec (this=this@entry=0x7fa63509ecc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007fa6f4d008d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#9  0x00007fa6373378f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#10 0x00007fa6f4d0587e in QThreadPrivate::start (arg=0x29b4290) at thread/qthread_unix.cpp:331
#11 0x00007fa6f3df166a in start_thread (arg=0x7fa63509f700) at pthread_create.c:333
#12 0x00007fa6f461ae4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa6f9f108c0 (LWP 7369)):
[KCrash Handler]
#6  QProcess::readChannel (this=this@entry=0x0) at io/qprocess.cpp:1289
#7  0x00007fa6f4e1b866 in QProcess::readAllStandardError (this=0x0) at io/qprocess.cpp:2023
#8  0x00007fa63428e4a9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/discover-notifier/MuonApplicationNotifier.so
#9  0x00007fa6f4f15547 in QtPrivate::QSlotObjectBase::call (a=0x7ffe07fa6930, r=0x29d45c0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#10 QMetaObject::activate (sender=sender@entry=0x3144d60, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe07fa6930) at kernel/qobject.cpp:3698
#11 0x00007fa6f4f15eb7 in QMetaObject::activate (sender=sender@entry=0x3144d60, m=m@entry=0x7fa6f512c400 <QProcess::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe07fa6930) at kernel/qobject.cpp:3578
#12 0x00007fa6f4e13e31 in QProcess::finished (this=this@entry=0x3144d60, _t1=0) at .moc/moc_qprocess.cpp:239
#13 0x00007fa6f4e1c7d8 in QProcessPrivate::_q_processDied (this=this@entry=0x1d6f210) at io/qprocess.cpp:1106
#14 0x00007fa6f4e7bd45 in QProcessPrivate::waitForFinished (this=this@entry=0x1d6f210, msecs=msecs@entry=30000) at io/qprocess_unix.cpp:1069
#15 0x00007fa6f4e1675f in QProcess::waitForFinished (this=this@entry=0x3144d60, msecs=msecs@entry=30000) at io/qprocess.cpp:1849
#16 0x00007fa6f4e16f7e in QProcess::~QProcess (this=0x3144d60, __in_chrg=<optimized out>) at io/qprocess.cpp:1189
#17 0x00007fa6f4e17039 in QProcess::~QProcess (this=0x3144d60, __in_chrg=<optimized out>) at io/qprocess.cpp:1196
#18 0x00007fa6f4f165a0 in QObject::event (this=0x3144d60, e=<optimized out>) at kernel/qobject.cpp:1230
#19 0x00007fa6f59e9ffc in QApplicationPrivate::notify_helper (this=this@entry=0x17ca690, receiver=receiver@entry=0x3144d60, e=e@entry=0x31138e0) at kernel/qapplication.cpp:3716
#20 0x00007fa6f59ef4c6 in QApplication::notify (this=0x7ffe07fa72b0, receiver=0x3144d60, e=0x31138e0) at kernel/qapplication.cpp:3499
#21 0x00007fa6f4ee6b6b in QCoreApplication::notifyInternal (this=0x7ffe07fa72b0, receiver=0x3144d60, event=event@entry=0x31138e0) at kernel/qcoreapplication.cpp:965
#22 0x00007fa6f4ee8f66 in QCoreApplication::sendEvent (event=0x31138e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x17c0600) at kernel/qcoreapplication.cpp:1593
#24 0x00007fa6f4ee9448 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#25 0x00007fa6f4f3cec3 in postEventSourceDispatch (s=0x18046b0) at kernel/qeventdispatcher_glib.cpp:271
#26 0x00007fa6f13a4117 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fa6f13a4370 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fa6f13a441c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fa6f4f3d2cf in QEventDispatcherGlib::processEvents (this=0x1803fb0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#30 0x00007fa6f4ee42fa in QEventLoop::exec (this=this@entry=0x7ffe07fa7150, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#31 0x00007fa6f4eec3cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#32 0x00007fa6f52208ec in QGuiApplication::exec () at kernel/qguiapplication.cpp:1530
#33 0x00007fa6f59e6435 in QApplication::exec () at kernel/qapplication.cpp:2976
#34 0x0000000000432d4a in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:179

Reported using DrKonqi