Bug 395317

Application: plasmashell (5.12.5)

Qt Version: 5.9.5
Frameworks Version: 5.46.0
Operating System: Linux 4.15.0-23-generic x86_64
Distribution: Ubuntu 18.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I was browsing programs  menu.
- Unusual behavior I noticed: Screen goes black for couple seconds. then desktop returns. Plasma restarted, I guess.

-- 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 0x7fa969c4a800 (LWP 3026))]

Thread 10 (Thread 0x7fa88dd19700 (LWP 3229)):
#0  0x00007fa96320ebf9 in __GI___poll (fds=0x7fa888006070, nfds=1, timeout=666420) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa95dd77439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa95dd7754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa963b5c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa963b019ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa96392022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa890675747 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fa96392516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa962aa16db in start_thread (arg=0x7fa88dd19700) at pthread_create.c:463
#9  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fa8a2690700 (LWP 3198)):
#0  0x00007fa96320ebf9 in __GI___poll (fds=0x7fa89c005750, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa95dd77439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa95dd7754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa963b5c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa963b019ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa96392022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa96762c2a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa96392516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa962aa16db in start_thread (arg=0x7fa8a2690700) at pthread_create.c:463
#9  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fa8b36e7700 (LWP 3124)):
#0  0x00007fa962aa79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5594023fe950) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fa962aa79f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5594023fe900, cond=0x5594023fe928) at pthread_cond_wait.c:502
#2  0x00007fa962aa79f3 in __pthread_cond_wait (cond=0x5594023fe928, mutex=0x5594023fe900) at pthread_cond_wait.c:655
#3  0x00007fa93cba0b7b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007fa93cba08a7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007fa962aa16db in start_thread (arg=0x7fa8b36e7700) at pthread_create.c:463
#6  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fa8b3ee8700 (LWP 3123)):
#0  0x00007fa962aa79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55940235fd9c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fa962aa79f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55940235fd48, cond=0x55940235fd70) at pthread_cond_wait.c:502
#2  0x00007fa962aa79f3 in __pthread_cond_wait (cond=0x55940235fd70, mutex=0x55940235fd48) at pthread_cond_wait.c:655
#3  0x00007fa93cba0b7b in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007fa93cba08a7 in  () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007fa962aa16db in start_thread (arg=0x7fa8b3ee8700) at pthread_create.c:463
#6  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fa93f5aa700 (LWP 3117)):
#0  0x00007fa962aa79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fa96960afb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fa962aa79f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fa96960af68, cond=0x7fa96960af90) at pthread_cond_wait.c:502
#2  0x00007fa962aa79f3 in __pthread_cond_wait (cond=0x7fa96960af90, mutex=0x7fa96960af68) at pthread_cond_wait.c:655
#3  0x00007fa9693145f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fa969314639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fa962aa16db in start_thread (arg=0x7fa93f5aa700) at pthread_create.c:463
#6  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fa949760700 (LWP 3097)):
#0  0x00007fa96320ebf9 in __GI___poll (fds=0x7fa938003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa95dd77439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa95dd7754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa963b5c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa963b019ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa96392022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa966a926f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa96392516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa962aa16db in start_thread (arg=0x7fa949760700) at pthread_create.c:463
#9  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fa94b7cb700 (LWP 3082)):
#0  0x00007fa96320ebf9 in __GI___poll (fds=0x7fa940004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa95dd77439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa95dd7754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa963b5c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa963b019ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa96392022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa966a926f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa96392516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa962aa16db in start_thread (arg=0x7fa94b7cb700) at pthread_create.c:463
#9  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fa9512e5700 (LWP 3040)):
#0  0x00007fa96320a0b4 in __GI___libc_read (fd=7, buf=0x7fa9512e4b60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fa95ddbb960 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa95dd76f27 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa95dd773e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa95dd7754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa963b5c90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa963b019ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa96392022a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa963fd9d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fa96392516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fa962aa16db in start_thread (arg=0x7fa9512e5700) at pthread_create.c:463
#11 0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fa953872700 (LWP 3037)):
#0  0x00007fa96320ebf9 in __GI___poll (fds=0x7fa953871ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa968239747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa96823b36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa95620b2a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fa96392516d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa962aa16db in start_thread (arg=0x7fa953872700) at pthread_create.c:463
#6  0x00007fa96321b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fa969c4a800 (LWP 3026)):
[KCrash Handler]
#6  0x00007fa963b0c810 in QMetaObject::methodOffset() const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa963b32cbb in QMetaObject::activate(QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa966856704 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fa966ab6dba in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fa966abd6cc in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007fa966abdac5 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007fa963b32679 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fa963a9e84c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fa8a124c0e6 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#15 0x00007fa8a126bf4f in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#16 0x00007fa8a126ee93 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#17 0x00007fa9669e9598 in QQmlVMEMetaObject::metaCall(QObject*, QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007fa9669ff242 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007fa9669fc7be in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007fa9669c68d9 in QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007fa9669c768e in QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*, QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007fa9669c7799 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007fa9669d613c in QV4::Runtime::method_setProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007fa8a11fe6eb in  ()
#25 0x00007ffffb843d80 in  ()
#26 0x00005594042a6c30 in  ()
#27 0x0000559403797780 in  ()
#28 0x00007fa9483615a0 in  ()
#29 0x00007fa93808b820 in  ()
#30 0x00007fa93808b760 in  ()
#31 0x00007fa948361528 in  ()
#32 0x00007ffffb843f10 in  ()
#33 0x0000559402161e90 in  ()
#34 0x0000000000000000 in  ()

Reported using DrKonqi