Application: plasmashell (5.12.7)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-46-generic x86_64
Distribution: Ubuntu 18.04.2 LTS

-- Information about the crash:
- Unusual behavior I noticed:
Plasma crashes just after Latte dock bar load

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 0x7f1a2de33800 (LWP 22957))]

Thread 14 (Thread 0x7f1936a83700 (LWP 23747)):
#0  0x00007f1a26c9b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x564e60eec464) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f1a26c9b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x564e60eec410, cond=0x564e60eec438) at pthread_cond_wait.c:502
#2  0x00007f1a26c9b9f3 in __pthread_cond_wait (cond=0x564e60eec438, mutex=0x564e60eec410) at pthread_cond_wait.c:655
#3  0x00007f1a27b155ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a2b89a6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f1a2b89ab0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a26c956db in start_thread (arg=0x7f1936a83700) at pthread_create.c:463
#8  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f1937484700 (LWP 23653)):
#0  0x00007f1a26c9b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x564e60d7a290) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f1a26c9b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x564e60d7a240, cond=0x564e60d7a268) at pthread_cond_wait.c:502
#2  0x00007f1a26c9b9f3 in __pthread_cond_wait (cond=0x564e60d7a268, mutex=0x564e60d7a240) at pthread_cond_wait.c:655
#3  0x00007f1a27b155ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a2b89a6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f1a2b89ab0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a26c956db in start_thread (arg=0x7f1937484700) at pthread_create.c:463
#8  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f1949586700 (LWP 23527)):
#0  0x00007f1a27402bf9 in __GI___poll (fds=0x7f1938003ce0, nfds=1, timeout=3435722) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f1a21f6c539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1949c4f747 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1a26c956db in start_thread (arg=0x7f1949586700) at pthread_create.c:463
#9  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f196bfff700 (LWP 23447)):
#0  0x00007f1a26c9b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x564e600331f4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f1a26c9b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x564e600331a0, cond=0x564e600331c8) at pthread_cond_wait.c:502
#2  0x00007f1a26c9b9f3 in __pthread_cond_wait (cond=0x564e600331c8, mutex=0x564e600331a0) at pthread_cond_wait.c:655
#3  0x00007f1a27b155ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a2b89a6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f1a2b89ab0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a26c956db in start_thread (arg=0x7f196bfff700) at pthread_create.c:463
#8  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f194bcb0700 (LWP 23445)):
#0  0x00007f1a26c9b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x564e5fdad9b4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f1a26c9b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x564e5fdad960, cond=0x564e5fdad988) at pthread_cond_wait.c:502
#2  0x00007f1a26c9b9f3 in __pthread_cond_wait (cond=0x564e5fdad988, mutex=0x564e5fdad960) at pthread_cond_wait.c:655
#3  0x00007f1a27b155ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a2b89a6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f1a2b89ab0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a26c956db in start_thread (arg=0x7f194bcb0700) at pthread_create.c:463
#8  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f195ea35700 (LWP 23430)):
#0  0x00007f1a27d4b892 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f1a21f6ba98 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1a21f6c46b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1a26c956db in start_thread (arg=0x7f195ea35700) at pthread_create.c:463
#9  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f195f236700 (LWP 23429)):
#0  0x00007f1a27b0ba1f in QMutex::unlock() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f1a27d4b8ef in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f1a21f6ba98 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1a21f6c46b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f195f84a3c5 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#9  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f1a26c956db in start_thread (arg=0x7f195f236700) at pthread_create.c:463
#11 0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f1973f47700 (LWP 23293)):
#0  0x00007f1a27402bf9 in __GI___poll (fds=0x7f196c005840, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f1a21f6c539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1a2b81b2a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1a26c956db in start_thread (arg=0x7f1973f47700) at pthread_create.c:463
#9  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f1a037bc700 (LWP 23135)):
#0  0x00007f1a26c9b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f1a2d7f0fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f1a26c9b9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f1a2d7f0f68, cond=0x7f1a2d7f0f90) at pthread_cond_wait.c:502
#2  0x00007f1a26c9b9f3 in __pthread_cond_wait (cond=0x7f1a2d7f0f90, mutex=0x7f1a2d7f0f68) at pthread_cond_wait.c:655
#3  0x00007f1a2d4fa5f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f1a2d4fa639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f1a26c956db in start_thread (arg=0x7f1a037bc700) at pthread_create.c:463
#6  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f1a0d969700 (LWP 23059)):
#0  0x00007f1a21f6b59e in g_main_context_release () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f1a21f6c4f6 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1a2ac816f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1a26c956db in start_thread (arg=0x7f1a0d969700) at pthread_create.c:463
#9  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f1a0f9d4700 (LWP 23051)):
#0  0x00007f1a21fb2049 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f1a21f6c638 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a2ac816f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1a26c956db in start_thread (arg=0x7f1a0f9d4700) at pthread_create.c:463
#8  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f1a15606700 (LWP 22980)):
#0  0x00007f1a27402bf9 in __GI___poll (fds=0x7f1a08004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f1a21f6c539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1a27d4b9bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a27b0f23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1a281c8d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1a26c956db in start_thread (arg=0x7f1a15606700) at pthread_create.c:463
#9  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f1a17b93700 (LWP 22974)):
#0  0x00007f1a27402bf9 in __GI___poll (fds=0x7f1a17b92ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f1a2c427747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f1a2c42936a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f1a1a52c2a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f1a27b1417d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1a26c956db in start_thread (arg=0x7f1a17b93700) at pthread_create.c:463
#6  0x00007f1a2740f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f1a2de33800 (LWP 22957)):
[KCrash Handler]
#6  0x00007f1a2b839268 in QQuickAnimatorProxyJob::sceneGraphInitialized() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f1a27d221d2 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1a28cfa83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f1a28d02104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f1a27cf29e8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f1a27cf515d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f1a27d4c373 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f1a21f6c387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f1a21f6c5c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007f1a21f6c64c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f1a27d4b99f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f1a27cf0a1a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f1a27cf9ac4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x0000564e5c8f9cfa in  ()
#20 0x00007f1a2730fb97 in __libc_start_main (main=0x564e5c8f9320, argc=1, argv=0x7fff3c6f0068, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff3c6f0058) at ../csu/libc-start.c:310
#21 0x0000564e5c8fa09a in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 381480.

Possible duplicates by query: bug 403223, bug 401319, bug 400845, bug 400525, bug 397374.

Reported using DrKonqi