Bug 426126

Application: plasmashell (5.14.5)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-10-amd64 x86_64
Distribution: Debian GNU/Linux 10 (buster)

-- Information about the crash:
- What I was doing when the application crashed:
--I moved the mouse over the taskbar, which is normally hided in my settings, and after showing the taskbar, the system freezes for about 30-40 seconds.
--Normally (by moving the mouse to the taskbar) I wanted to switch from dolphin to konsole when the crash happens.
--There were no big operations running in dolphin or konsole but a backup script (cp -ru ... ...) was running as cronjob in the background.

--By the way: the memory used by plasmashell is increasing from 90MB (after login) up to 300-400MB in 20-30 minutes. And there isn't really a difference between working with the system or not working with it...

The crash can be reproduced sometimes.

-- 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 0x7f44c8fe4840 (LWP 17386))]

Thread 8 (Thread 0x7f449f7fe700 (LWP 17559)):
#0  0x00007f44cdfe7819 in __GI___poll (fds=0x7f4498004e10, nfds=1, timeout=5629) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f44cc0dc136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f44cc0dc25c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f44ce4f9743 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f44ce4a715b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f44ce2f6e76 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f44ce300a67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f44aafe6700 (LWP 17553)):
#0  0x00007ffe0ed8eb34 in clock_gettime ()
#1  0x00007f44cdfffff6 in __GI___clock_gettime (clock_id=1, tp=0x7f44aafe5a60) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f44ce4f9061 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f44ce4f7899 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f44ce4f7e95 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f44ce4f94be in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f44cc0db669 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f44cc0dc06b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f44cc0dc25c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f44ce4f9743 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f44ce4a715b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f44ce2f6e76 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f44cfeac476 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f44ce300a67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f44b3020700 (LWP 17544)):
#0  0x00007f44cd22300c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f8548579d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f44cd22300c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f854857988, cond=0x55f8548579b0) at pthread_cond_wait.c:502
#2  0x00007f44cd22300c in __pthread_cond_wait (cond=0x55f8548579b0, mutex=0x55f854857988) at pthread_cond_wait.c:655
#3  0x00007f44b736e51b in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f44b736e397 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f44b3821700 (LWP 17543)):
#0  0x00007f44cd22300c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f854857878) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f44cd22300c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f854857828, cond=0x55f854857850) at pthread_cond_wait.c:502
#2  0x00007f44cd22300c in __pthread_cond_wait (cond=0x55f854857850, mutex=0x55f854857828) at pthread_cond_wait.c:655
#3  0x00007f44b736e51b in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f44b736e397 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f44c5f7e700 (LWP 17542)):
#0  0x00007ffe0ed8eb34 in clock_gettime ()
#1  0x00007f44cdfffff6 in __GI___clock_gettime (clock_id=1, tp=0x7f44c5f7da80) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f44ce4f9061 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f44ce4f7899 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f44ce4f7e95 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f44ce4f94be in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f44cc0db669 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f44cc0dc06b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f44cc0dc25c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f44ce4f9743 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f44ce4a715b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f44ce2f6e76 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f44cfc27c65 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f44ce300a67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f44c71ae700 (LWP 17388)):
#0  0x00007ffe0ed8eb34 in clock_gettime ()
#1  0x00007f44cdfffff6 in __GI___clock_gettime (clock_id=1, tp=0x7f44c71ada70) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f44ce4f9061 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f44ce4f7899 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f44ce4f7e95 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f44ce4f94be in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f44cc0db669 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f44cc0dc06b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f44cc0dc25c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f44ce4f9743 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f44ce4a715b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f44ce2f6e76 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f44ced33545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#13 0x00007f44ce300a67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f44c8234700 (LWP 17387)):
#0  0x00007f44cdfe7819 in __GI___poll (fds=0x7f44c8233c78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f44d02f8cf7 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f44d02fa91a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f44c8b80d79 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f44ce300a67 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f44cd21cfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f44cdff24cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f44c8fe4840 (LWP 17386)):
[KCrash Handler]
#6  0x00007f44ce4d1df5 in QMetaObject::activate(QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f44cfa217d0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f44cfc6a8de in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f44cfc715fc in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f44cfc719cb in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f44ce4d18b7 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f44ce45beed in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f44b0661abc in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#14 0x00007f44b067e593 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#15 0x00007f44b06816fb in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#16 0x00007f44cfb7b726 in QQmlVMEMetaObject::metaCall(QObject*, QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f44cfb91d32 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007f44cfb8f009 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007f44cfb45590 in QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f44cfb45fae 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
#21 0x00007f44cfb460a4 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f44cfb5911c in QV4::Runtime::method_storeProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007f44cfb64959 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007f44a92b648f in  ()
#25 0x00007f44c533f4f8 in  ()
#26 0x00007f44c533f508 in  ()
#27 0x000055f8544da380 in  ()
#28 0x0000000000000000 in  ()
[Inferior 1 (process 17386) detached]

Reported using DrKonqi