Bug 372499

Application: plasma-discover (5.8.3)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.4.0-47-generic x86_64
Distribution: KDE neon User Edition 5.8

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

installed git-cola. As soon as the installation finished the application failed. I reported this a few minutes ago, this report adds to or replaces the previous.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f07c4ac18c0 (LWP 14804))]

Thread 7 (Thread 0x7f078da8f700 (LWP 14822)):
#0  0x00007f07bce86ac9 in g_mutex_lock (mutex=mutex@entry=0x7f0788000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007f07bce41ddc in g_main_context_check (context=context@entry=0x7f0788000990, max_priority=2147483647, fds=fds@entry=0x7f07880404e0, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3683
#2  0x00007f07bce42340 in g_main_context_iterate (context=context@entry=0x7f0788000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#3  0x00007f07bce424ac in g_main_context_iteration (context=0x7f0788000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007f07c1fd223b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07c1f7ccea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f07c1da1fb4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c1da6b98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f07bece970a in start_thread (arg=0x7f078da8f700) at pthread_create.c:333
#9  0x00007f07c13aa82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f07a2322700 (LWP 14810)):
#0  0x00007f07c1fd03be in QTimerInfoList::repairTimersIfNeeded() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f07c1fd0433 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f07c1fd17ee in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f07bce4192d in g_main_context_prepare (context=context@entry=0x7f0790000990, priority=priority@entry=0x7f07a2321bc0) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3442
#4  0x00007f07bce422cb in g_main_context_iterate (context=context@entry=0x7f0790000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3820
#5  0x00007f07bce424ac in g_main_context_iteration (context=0x7f0790000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#6  0x00007f07c1fd223b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c1f7ccea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f07c1da1fb4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f07c1da6b98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f07bece970a in start_thread (arg=0x7f07a2322700) at pthread_create.c:333
#11 0x00007f07c13aa82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f07a2b23700 (LWP 14809)):
#0  0x00007f07c139a69d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f07bce85740 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f07a2b22a80, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f07bce85740 in g_wakeup_acknowledge (wakeup=0x7f079c002390) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gwakeup.c:210
#3  0x00007f07bce41e84 in g_main_context_check (context=context@entry=0x7f0798000990, max_priority=2147483647, fds=fds@entry=0x7f079805e7d0, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3632
#4  0x00007f07bce42340 in g_main_context_iterate (context=context@entry=0x7f0798000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#5  0x00007f07bce424ac in g_main_context_iteration (context=0x7f0798000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#6  0x00007f07c1fd223b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c1f7ccea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f07c1da1fb4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f07c4376aa6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f07c1da6b98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f07bece970a in start_thread (arg=0x7f07a2b23700) at pthread_create.c:333
#12 0x00007f07c13aa82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f07a9feb700 (LWP 14808)):
#0  0x00007f07c139eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f07bce4239c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f079c002e70, timeout=<optimized out>, context=0x7f079c000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:4135
#2  0x00007f07bce4239c in g_main_context_iterate (context=context@entry=0x7f079c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3835
#3  0x00007f07bce424ac in g_main_context_iteration (context=0x7f079c000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007f07c1fd223b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07c1f7ccea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f07c1da1fb4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c2729675 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f07c1da6b98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f07bece970a in start_thread (arg=0x7f07a9feb700) at pthread_create.c:333
#10 0x00007f07c13aa82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f07ab1fc700 (LWP 14807)):
#0  0x00007f07bce86ac5 in g_mutex_lock (mutex=mutex@entry=0x7f07a4000990) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gthread-posix.c:1335
#1  0x00007f07bce41ddc in g_main_context_check (context=context@entry=0x7f07a4000990, max_priority=2147483647, fds=fds@entry=0x7f07a4018690, n_fds=n_fds@entry=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3683
#2  0x00007f07bce42340 in g_main_context_iterate (context=context@entry=0x7f07a4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3837
#3  0x00007f07bce424ac in g_main_context_iteration (context=0x7f07a4000990, may_block=1) at /build/glib2.0-7IO_Yw/glib2.0-2.48.1/./glib/gmain.c:3901
#4  0x00007f07c1fd223b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07c1f7ccea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f07c1da1fb4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f07c4c067a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f07c1da6b98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f07bece970a in start_thread (arg=0x7f07ab1fc700) at pthread_create.c:333
#10 0x00007f07c13aa82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f07b3795700 (LWP 14806)):
#0  0x00007f07c139eb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f07bc9d7c62 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f07bc9d98d7 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f07b5ceca39 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f07c1da6b98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f07bece970a in start_thread (arg=0x7f07b3795700) at pthread_create.c:333
#6  0x00007f07c13aa82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f07c4ac18c0 (LWP 14804)):
[KCrash Handler]
#6  0x00007f0794dae1b7 in as_provided_get_items () at /usr/lib/x86_64-linux-gnu/libappstream.so.4
#7  0x00007f0794fdb18b in AppStream::Provided::items() const () at /usr/lib/x86_64-linux-gnu/libAppStreamQt.so.2
#8  0x00007f0795449d10 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#9  0x00007f0795449da2 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#10 0x00007f0795449f85 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#11 0x00007f07c4056393 in  () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#12 0x00007f07c4058a8b in AbstractResource::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#13 0x00007f0795457655 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#14 0x00007f07c267536e in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f07c2675995 in QV4::QObjectWrapper::getProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f07c26761ba in QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f07c2687ece in QV4::Runtime::getProperty(QV4::ExecutionEngine*, QV4::Value const&, int) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007f07a877f8ba in  ()
#19 0x00007f07a8fec390 in  ()
#20 0x0001800000000000 in  ()
#21 0x00007ffec4cae420 in  ()
#22 0x00000000008e2680 in  ()
#23 0x0000000000000000 in  ()

Reported using DrKonqi