Application: plasma-discover (5.12.8)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 5.0.0-37-generic x86_64
Distribution: Ubuntu 18.04.3 LTS

-- Information about the crash:
App just crashed on start, no window showed up even.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f226a1ab800 (LWP 22228))]

Thread 11 (Thread 0x7f22229e0700 (LWP 22244)):
#0  0x00007f225ff6a515 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f225ff6ca63 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d4fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f22660c499b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f2265e8823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f226209b6db in start_thread (arg=0x7f22229e0700) at pthread_create.c:463
#9  0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f22237fe700 (LWP 22243)):
#0  0x00007f22620a1ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f22237fdc40, expected=0, futex_word=0x7f221c0042f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f22620a1ed9 in __pthread_cond_wait_common (abstime=0x7f22237fdd00, mutex=0x7f221c0042a0, cond=0x7f221c0042c8) at pthread_cond_wait.c:533
#2  0x00007f22620a1ed9 in __pthread_cond_timedwait (cond=0x7f221c0042c8, mutex=0x7f221c0042a0, abstime=0x7f22237fdd00) at pthread_cond_wait.c:667
#3  0x00007f2265e8e468 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2265e8a53d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f226209b6db in start_thread (arg=0x7f22237fe700) at pthread_create.c:463
#7  0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f2223fff700 (LWP 22242)):
#0  0x00007f22620a19f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f221c023c70) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f22620a19f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f221c023c20, cond=0x7f221c023c48) at pthread_cond_wait.c:502
#2  0x00007f22620a19f3 in __pthread_cond_wait (cond=0x7f221c023c48, mutex=0x7f221c023c20) at pthread_cond_wait.c:655
#3  0x00007f2265e8e5ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2265e86c1b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f226609a958 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f22636fbdf2 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#7  0x00007f22636fcd4c in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#8  0x00007f226609a645 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f22636faeb2 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#10 0x00007f226365c23f in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#11 0x00007f226365d6cc in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#12 0x00007f226609a645 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f22636cfdd2 in QSslSocket::preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator*) () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#14 0x00007f22636f3cdc in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#15 0x00007f22304fd156 in  () at /usr/lib/x86_64-linux-gnu/libssl.so.1.1
#16 0x00007f22304fb2eb in  () at /usr/lib/x86_64-linux-gnu/libssl.so.1.1
#17 0x00007f223050524e in  () at /usr/lib/x86_64-linux-gnu/libssl.so.1.1
#18 0x00007f2230504147 in  () at /usr/lib/x86_64-linux-gnu/libssl.so.1.1
#19 0x00007f22304f04c4 in SSL_do_handshake () at /usr/lib/x86_64-linux-gnu/libssl.so.1.1
#20 0x00007f22636f410d in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#21 0x00007f22636f4835 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#22 0x00007f22636d08cc in QSslSocket::startClientEncryption() () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#23 0x00007f22636d1578 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#24 0x00007f22636d9379 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#25 0x00007f226609a645 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f22636a3f09 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#27 0x00007f22636a6e78 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#28 0x00007f22636b77ed in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#29 0x00007f226833f83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f2268347104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007f226606b9c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f22660c55dd in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f225ff6d417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f225ff6d650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f22660c499b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f2265e8823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007f226209b6db in start_thread (arg=0x7f2223fff700) at pthread_create.c:463
#41 0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f223236a700 (LWP 22235)):
#0  0x00007f22657770b4 in __GI___libc_read (fd=17, buf=0x7f2232369b90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f225ffb22d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f225ff6d570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f22660c499b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2265e8823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f226209b6db in start_thread (arg=0x7f223236a700) at pthread_create.c:463
#10 0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f2232b6b700 (LWP 22234)):
#0  0x00007f22657770b4 in __GI___libc_read (fd=15, buf=0x7f2232b6acd0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f225ffb22d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f225ff6d570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f225ff6d962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f22349aa0e6 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f225ff95195 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f226209b6db in start_thread (arg=0x7f2232b6b700) at pthread_create.c:463
#8  0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f223336c700 (LWP 22233)):
#0  0x00007f226577bbf9 in __GI___poll (fds=0x55cc07b6f7a0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f225ff6d5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f225ff6d721 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f225ff95195 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f226209b6db in start_thread (arg=0x7f223336c700) at pthread_create.c:463
#6  0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f223ec74700 (LWP 22232)):
#0  0x00007f22657770b4 in __GI___libc_read (fd=12, buf=0x7f223ec73b20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f225ffb22d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f225ff6d570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f22660c499b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2265e8823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f22692682a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f226209b6db in start_thread (arg=0x7f223ec74700) at pthread_create.c:463
#11 0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f224d9da700 (LWP 22231)):
#0  0x00007f225ffb3649 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f225ff6d58e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f22660c499b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2265e8823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f2266a9e6f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f226209b6db in start_thread (arg=0x7f224d9da700) at pthread_create.c:463
#9  0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f224ebeb700 (LWP 22230)):
#0  0x00007f225ffb3649 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f225ff6ce1f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f225ff6d570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f22660c499b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f2265e8823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2267279d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f226209b6db in start_thread (arg=0x7f224ebeb700) at pthread_create.c:463
#10 0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f2257cae700 (LWP 22229)):
#0  0x00007f226577bbf9 in __GI___poll (fds=0x7f2257cadca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f225fd04747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f225fd0636a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f225aa5b5e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f2265e8d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f226209b6db in start_thread (arg=0x7f2257cae700) at pthread_create.c:463
#6  0x00007f226578888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f226a1ab800 (LWP 22228)):
[KCrash Handler]
#6  0x00007f22656a5e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f22656a7801 in __GI_abort () at abort.c:79
#8  0x00007f2265e77fb7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f22692cb2a7 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f22692cc275 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f22692cce9a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f2267b8f3d5 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f22693416c5 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f226833f83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f2268347104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f226606b9c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f2267b8449f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007f2267b850dd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007f2267b5c2eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007f225aac0260 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#21 0x00007f225ff6d417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f225ff6d650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f225ff6d6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f22660c497f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f22660699fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f2266072aa4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x000055cc06a5e148 in  ()
#28 0x00007f2265688b97 in __libc_start_main (main=0x55cc06a5d870, argc=1, argv=0x7ffc41c68c28, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc41c68c18) at ../csu/libc-start.c:310
#29 0x000055cc06a5e3ca in _start ()

Reported using DrKonqi