Application: plasma-discover (5.10.5)

Qt Version: 5.9.2
Frameworks Version: 5.38.0
Operating System: Linux 4.13.12-200.fc26.x86_64+debug x86_64
Distribution: "Fedora release 26 (Twenty Six)"

-- Information about the crash:
- What I was doing when the application crashed: I was searching for the application Feddy. It crashed the first time but not the second & third time I searched.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1b1afad8c0 (LWP 1938))]

Thread 12 (Thread 0x7f1abffff700 (LWP 1953)):
#0  0x00007f1b160bfd2d in poll () at /lib64/libc.so.6
#1  0x00007f1b0f568579 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f1b16ee749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1b16ce699a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f1ad4d1f700 (LWP 1951)):
#0  0x00007f1b14c37e0a in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1b16ceb2c3 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib64/libQt5Core.so.5
#2  0x00007f1b16ce7cdf in QThreadPoolThread::run() () at /lib64/libQt5Core.so.5
#3  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#4  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#5  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f1ad64b5700 (LWP 1950)):
#0  0x00007f1b160bfd2d in poll () at /lib64/libc.so.6
#1  0x00007f1b0f568579 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f1b16ee749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1b16ce699a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f1ad6cb6700 (LWP 1949)):
#0  0x00007f1b160bfd2d in poll () at /lib64/libc.so.6
#1  0x00007f1b0f568579 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f1b16ee749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1b16ce699a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f1ad74b7700 (LWP 1946)):
#0  0x00007f1b0f5ad4a4 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f1b0f567f19 in g_main_context_check () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f568520 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f1b0f568912 in g_main_loop_run () at /lib64/libglib-2.0.so.0
#4  0x00007f1adeb42db6 in gdbus_shared_thread_func () at /lib64/libgio-2.0.so.0
#5  0x00007f1b0f58f516 in g_thread_proxy () at /lib64/libglib-2.0.so.0
#6  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#7  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f1ad7cb8700 (LWP 1945)):
#0  0x00007f1b160bfd2d in poll () at /lib64/libc.so.6
#1  0x00007f1b0f568579 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f1b0f5686d1 in glib_worker_main () at /lib64/libglib-2.0.so.0
#4  0x00007f1b0f58f516 in g_thread_proxy () at /lib64/libglib-2.0.so.0
#5  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f1ae7bda700 (LWP 1944)):
#0  0x00007f1b160bb42d in read () at /lib64/libc.so.6
#1  0x00007f1b0f5ac150 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f568088 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f1b0f568520 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f1b16ee749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f1b16ce699a in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f1b1a600176 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#9  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#11 0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f1ae86a4700 (LWP 1943)):
#0  0x00007f1b14c3790b in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1af070714b in util_queue_thread_func () at /usr/lib64/dri/nouveau_dri.so
#2  0x00007f1af0707067 in impl_thrd_routine () at /usr/lib64/dri/nouveau_dri.so
#3  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#4  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f1af9788700 (LWP 1942)):
#0  0x00007f1b0f5ad4a4 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f1b0f56813b in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f5685f8 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f1b16ee749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f1b16ce699a in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f1b177e9cf5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#10 0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f1afa999700 (LWP 1941)):
#0  0x00007f1b160bfd2d in poll () at /lib64/libc.so.6
#1  0x00007f1b0f568579 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f1b16ee749b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1b16ce699a in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f1b1b0fb689 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#9  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f1b03366700 (LWP 1940)):
#0  0x00007f1b160bfd2d in poll () at /lib64/libc.so.6
#1  0x00007f1b0eef1c97 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f1b0eef3a8a in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f1b05f06259 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f1b16ceac72 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f1b14c3136d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1b160cbe1f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f1b1afad8c0 (LWP 1938)):
[KCrash Handler]
#6  0x00007f1b16ec7984 in QVector<QObjectPrivate::ConnectionList>::reallocData(int, int, QFlags<QArrayData::AllocationOption>) () at /lib64/libQt5Core.so.5
#7  0x00007f1b16ec0b93 in QObjectPrivate::addConnection(int, QObjectPrivate::Connection*) () at /lib64/libQt5Core.so.5
#8  0x00007f1b16ec44a4 in QObjectPrivate::connectImpl(QObject const*, int, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) () at /lib64/libQt5Core.so.5
#9  0x00007f1b16ec47b2 in QObject::connectImpl(QObject const*, void**, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) () at /lib64/libQt5Core.so.5
#10 0x00007f1ad5613ec6 in QtPrivate::QFunctorSlotObject<KNSBackend::searchStream(QString const&)::{lambda()#2}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) () at /usr/lib64/qt5/plugins/discover/kns-backend.so
#11 0x00007f1b16ebfa5a in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#12 0x00007f1b17f2dc9c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#13 0x00007f1b17f354e4 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#14 0x00007f1b16e964a7 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#15 0x00007f1b16e98c2b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#16 0x00007f1b16ee7693 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#17 0x00007f1b0f568257 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#18 0x00007f1b0f5685f8 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#19 0x00007f1b0f56868c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#20 0x00007f1b16ee747f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#21 0x00007f1b16e9522a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#22 0x00007f1b16e9d884 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#23 0x000056246fcf5750 in main ()

The reporter indicates this bug may be a duplicate of or related to bug 385679.

Possible duplicates by query: bug 386319, bug 385679, bug 384871, bug 383246, bug 382509.

Reported using DrKonqi