Bug 400198

Summary: Discover opens ok but crashes when I click on "applications", "application addons" or "plasma addons"
Product: [Applications] Discover Reporter: Bill Donnelly <wtdonnelly>
Component: discoverAssignee: Aleix Pol <aleixpol>
Status: RESOLVED FIXED    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version First Reported In: 5.14.0   
Target Milestone: ---   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Bill Donnelly 2018-10-23 12:41:09 UTC 
Application: plasma-discover (5.14.0)

Qt Version: 5.11.2
Frameworks Version: 5.50.0
Operating System: Linux 4.18.14-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:

Immediately after opening Discover, if I clicked on applications, application addons, or plasma addons, Discover would crash.  This happened every time I tried it, for 5 times.  A short time later now (no reboot) ti is working ok again.  This has happened sever times in the last couple of days.  This may (or may not) be related to 397863.

Operating System: openSUSE Tumbleweed 20181018
KDE Plasma Version: 5.14.0
Qt Version: 5.11.2
KDE Frameworks Version: 5.50.0
Kernel Version: 4.18.14-1-default
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-2720QM CPU @ 2.20GHz
Memory: 15.6 GiB of RAM

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 0x7f736de90800 (LWP 11613))]

Thread 13 (Thread 0x7f7339e2f700 (LWP 11691)):
#0  0x00007f7371d7c2c9 in poll () from /lib64/libc.so.6
#1  0x00007f736fb51f46 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f732000b7d0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f7339e2eda0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f737229cde6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8eafffa0) at thread/qthread_unix.cpp:367
#7  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7f733a630700 (LWP 11647)):
#0  0x00007f7371d7c2c9 in poll () from /lib64/libc.so.6
#1  0x00007f736fb51f46 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f732c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f733a62fda0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f737229cde6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8d62f2c0) at thread/qthread_unix.cpp:367
#7  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7f733b04b700 (LWP 11634)):
#0  0x00007f7371d7c2c9 in poll () from /lib64/libc.so.6
#1  0x00007f736fb51f46 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb522d2 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f7354400a56 in ?? () from /usr/lib64/libgio-2.0.so.0
#4  0x00007f736fb7a476 in ?? () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f733b84c700 (LWP 11633)):
#0  0x00007f7371d7c2c9 in poll () from /lib64/libc.so.6
#1  0x00007f736fb51f46 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f736fb520b1 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f736fb7a476 in ?? () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f7343fff700 (LWP 11625)):
#0  0x00007f7371d81739 in syscall () from /lib64/libc.so.6
#1  0x00007f737229ba24 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=<optimized out>, op=0, addr=<optimized out>) at thread/qfutex_p.h:105
#2  QtLinuxFutex::futexWait<QBasicAtomicInteger<unsigned int> > (expectedValue=<optimized out>, futex=...) at thread/qfutex_p.h:107
#3  futexSemaphoreTryAcquire_loop<false> (timeout=-1, nn=8589934593, curValue=<optimized out>, u=...) at thread/qsemaphore.cpp:221
#4  futexSemaphoreTryAcquire<false> (timeout=-1, n=<optimized out>, u=...) at thread/qsemaphore.cpp:264
#5  QSemaphore::acquire (this=0x7f737171b2e0, n=<optimized out>) at thread/qsemaphore.cpp:328
#6  0x00007f737165cd14 in ?? () from /usr/lib64/libQt5Network.so.5
#7  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x7f737171b2c0) at thread/qthread_unix.cpp:367
#8  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f7354d00700 (LWP 11624)):
#0  0x00007f7371d81739 in syscall () from /lib64/libc.so.6
#1  0x00007f7372299955 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=3, op=0, addr=0x7f73726dbcc0 <_q_ObjectMutexPool+512>) at thread/qfutex_p.h:105
#2  QtLinuxFutex::futexWait<QBasicAtomicPointer<QMutexData> > (expectedValue=0x3, futex=...) at thread/qfutex_p.h:107
#3  lockInternal_helper<false> (timeout=-1, elapsedTimer=0x0, d_ptr=...) at thread/qmutex_linux.cpp:145
#4  QBasicMutex::lockInternal (this=0x7f73726dbcc0 <_q_ObjectMutexPool+512>) at thread/qmutex_linux.cpp:162
#5  0x00007f7372299b3a in QMutex::lock (this=this@entry=0x7f73726dbcc0 <_q_ObjectMutexPool+512>) at thread/qmutex.cpp:229
#6  0x00007f737247c618 in QOrderedMutexLocker::relock (mtx2=0x7f73726dbcc0 <_q_ObjectMutexPool+512>, mtx1=0x7f73726dbe70 <_q_ObjectMutexPool+944>) at ../../include/QtCore/5.11.2/QtCore/private/../../../../../src/corelib/thread/qorderedmutexlocker_p.h:109
#7  QMetaObjectPrivate::disconnectHelper (disconnectType=<optimized out>, senderMutex=0x7f73726dbe70 <_q_ObjectMutexPool+944>, slot=0x0, method_index=<optimized out>, receiver=0x7f73480425a0, c=0x7f73480456d0) at kernel/qobject.cpp:3377
#8  QMetaObjectPrivate::disconnect (sender=<optimized out>, signal_index=<optimized out>, smeta=<optimized out>, receiver=0x7f73480425a0, method_index=<optimized out>, disconnectType=<optimized out>, slot=0x0) at kernel/qobject.cpp:3437
#9  0x00007f737247cbc3 in QObject::disconnect (sender=0x7f7348045040, signal=0x0, receiver=0x7f73480425a0, method=0x0) at kernel/qobject.cpp:3011
#10 0x00007f737160ddf6 in ?? () from /usr/lib64/libQt5Network.so.5
#11 0x00007f737160dfc9 in ?? () from /usr/lib64/libQt5Network.so.5
#12 0x00007f737247ed8c in QScopedPointerDeleter<QObjectData>::cleanup (pointer=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:52
#13 QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::~QScopedPointer (this=0x555d8eb18e48, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:107
#14 QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:884
#15 0x00007f73716221c7 in ?? () from /usr/lib64/libQt5Network.so.5
#16 0x00007f73715c47ae in ?? () from /usr/lib64/libQt5Network.so.5
#17 0x00007f73724788bb in QObject::event (this=0x7f73480025c0, e=<optimized out>) at kernel/qobject.cpp:1232
#18 0x00007f73732934a1 in QApplicationPrivate::notify_helper (this=this@entry=0x555d8ce95c40, receiver=receiver@entry=0x7f73480025c0, e=e@entry=0x7f7354cffb40) at kernel/qapplication.cpp:3728
#19 0x00007f737329aaf0 in QApplication::notify (this=0x7ffc84bdc510, receiver=0x7f73480025c0, e=0x7f7354cffb40) at kernel/qapplication.cpp:3487
#20 0x00007f737244ee09 in QCoreApplication::notifyInternal2 (receiver=0x7f73480025c0, event=event@entry=0x7f7354cffb40) at ../../include/QtCore/5.11.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:307
#21 0x00007f737249fed8 in QCoreApplication::sendEvent (event=0x7f7354cffb40, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#22 QTimerInfoList::activateTimers (this=0x7f73480048f0) at kernel/qtimerinfo_unix.cpp:643
#23 0x00007f73724a0734 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
#24 0x00007f736fb51c15 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#25 0x00007f736fb51fd8 in ?? () from /usr/lib64/libglib-2.0.so.0
#26 0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#27 0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f7348000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#28 0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f7354cffda0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#29 0x00007f737229cde6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#30 0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8ebb1d00) at thread/qthread_unix.cpp:367
#31 0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#32 0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f735557b700 (LWP 11623)):
#0  0x00007f7371d7c2c9 in poll () from /lib64/libc.so.6
#1  0x00007f736fb51f46 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f7344000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f735557ada0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f737229cde6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8eaf17c0) at thread/qthread_unix.cpp:367
#7  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f73575bf700 (LWP 11622)):
#0  0x00007f736fb98839 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f736fb51e50 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f734c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f73575bed60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f737229cde6 in QThread::exec (this=this@entry=0x555d8e9fa040) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f7373c4e396 in QQuickPixmapReader::run (this=0x555d8e9fa040) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/util/qquickpixmapcache.cpp:934
#7  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8e9fa040) at thread/qthread_unix.cpp:367
#8  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f736081f700 (LWP 11620)):
#0  0x00007f7370c3a4dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7360ce6f5b in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007f7360ce6c87 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f73633e8700 (LWP 11618)):
#0  0x00007f7371d77d34 in read () from /lib64/libc.so.6
#1  0x00007f736fb974b0 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb51a4b in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f736fb51ef0 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f7358000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f73633e7d80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f737229cde6 in QThread::exec (this=this@entry=0x555d8cfefe70) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f7372a31485 in QQmlThreadPrivate::run (this=0x555d8cfefe70) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/qml/qml/ftw/qqmlthread.cpp:148
#9  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8cfefe70) at thread/qthread_unix.cpp:367
#10 0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f736891c700 (LWP 11616)):
#0  0x00007f7371d77d34 in read () from /lib64/libc.so.6
#1  0x00007f736fb974b0 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f736fb51a4b in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f736fb51ef0 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f73724a0adb in QEventDispatcherGlib::processEvents (this=0x7f735c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7f736891bd70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f737229cde6 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f73737a3545 in ?? () from /usr/lib64/libQt5DBus.so.5
#9  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x7f737381dd60) at thread/qthread_unix.cpp:367
#10 0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f736b02a700 (LWP 11615)):
#0  0x00007f7371d7c2c9 in poll () from /lib64/libc.so.6
#1  0x00007f736fae3cc7 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007f736fae58ea in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f736c211519 in QXcbEventReader::run (this=0x555d8ceb5cd0) at qxcbconnection.h:409
#4  0x00007f73722a69b7 in QThreadPrivate::start (arg=0x555d8ceb5cd0) at thread/qthread_unix.cpp:367
#5  0x00007f7370c34554 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f7371d86ccf in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f736de90800 (LWP 11613)):
[KCrash Handler]
#6  0x00007f737247a559 in QMetaObjectPrivate::disconnect (sender=0x555d8e8e2870, signal_index=53, smeta=0x7f736a113340 <QQuickMenu::staticMetaObject>, receiver=0xc1, method_index=-1, slot=0x7ffc84bdb7f0, disconnectType=QMetaObjectPrivate::DisconnectAll) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1038
#7  0x00007f737247aa57 in QObject::disconnectImpl (sender=0x555d8e8e2870, signal=signal@entry=0x7ffc84bdb7e0, receiver=receiver@entry=0xc1, slot=slot@entry=0x7ffc84bdb7f0, senderMetaObject=senderMetaObject@entry=0x7f736a113340 <QQuickMenu::staticMetaObject>) at kernel/qobject.cpp:4987
#8  0x00007f736a08248c in QObject::disconnect<void (QQuickMenu::*)(bool), void (QQuickMenu::*)(bool)> (slot=(void (QQuickMenu::*)(QQuickMenu * const, bool)) 0x7f736a081db0 <QQuickMenu::setCascade(bool)>, receiver=0xc1, signal=(void (QQuickMenu::*)(QQuickMenu * const, bool)) 0x7f736a081160 <QQuickMenu::cascadeChanged(bool)>, sender=<optimized out>) at /usr/include/qt5/QtCore/qobject.h:353
#9  QQuickMenuPrivate::setParentMenu (this=0x555d95136ff0, parent=parent@entry=0x0) at qquickmenu.cpp:486
#10 0x00007f736a083bab in QQuickMenuPrivate::removeItem (this=0x555d95d68f50, index=<optimized out>, item=<optimized out>) at /usr/include/qt5/QtCore/qglobal.h:1038
#11 0x00007f7373d0eaf7 in QQuickItemPrivate::itemChange (this=this@entry=0x555d90b284b0, change=change@entry=QQuickItem::ItemParentHasChanged, data=...) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.cpp:6217
#12 0x00007f7373d146ef in QQuickItem::setParentItem (this=0x555d90739ee0, parentItem=parentItem@entry=0x0) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.h:182
#13 0x00007f7373d15a9c in QQuickItem::~QQuickItem (this=0x555d8f5f9940, __in_chrg=<optimized out>) at /usr/include/qt5/QtCore/qlist.h:540
#14 0x00007f7373d15d89 in QQuickItem::~QQuickItem (this=0x555d8f5f9940, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.cpp:2381
#15 0x00007f737247601b in QObjectPrivate::deleteChildren (this=this@entry=0x555d93d5ce30) at kernel/qobject.cpp:1997
#16 0x00007f737247ed44 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#17 0x00007f7373d15b6a in QQuickItem::~QQuickItem (this=0x555d8f5f9880, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.cpp:2441
#18 0x00007f7373d34255 in QQmlPrivate::QQmlElement<QQuickListView>::~QQmlElement (this=0x555d8f5f9880, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/include/QtQml/../../src/qml/qml/qqmlprivate.h:101
#19 QQmlPrivate::QQmlElement<QQuickListView>::~QQmlElement (this=0x555d8f5f9880, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#20 0x00007f737247601b in QObjectPrivate::deleteChildren (this=this@entry=0x555d95d68f50) at kernel/qobject.cpp:1997
#21 0x00007f737247ed44 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#22 0x00007f7361994edd in QQuickMenu::~QQuickMenu (this=0x555d93c4a7d0, __in_chrg=<optimized out>) at ../../../include/QtQuickTemplates2/5.11.2/QtQuickTemplates2/private/../../../../../src/quicktemplates2/qquickmenu_p.h:63
#23 QQmlPrivate::QQmlElement<QQuickMenu>::~QQmlElement (this=0x555d93c4a7d0, __in_chrg=<optimized out>) at /usr/include/qt5/QtQml/qqmlprivate.h:103
#24 QQmlPrivate::QQmlElement<QQuickMenu>::~QQmlElement (this=0x555d93c4a7d0, __in_chrg=<optimized out>) at /usr/include/qt5/QtQml/qqmlprivate.h:103
#25 0x00007f737247601b in QObjectPrivate::deleteChildren (this=this@entry=0x555d8fd73ec0) at kernel/qobject.cpp:1997
#26 0x00007f737247ed44 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#27 0x00007f7373d15b6a in QQuickItem::~QQuickItem (this=0x555d8f929d50, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.cpp:2441
#28 0x00007f7373d344a5 in QQmlPrivate::QQmlElement<QQuickMouseArea>::~QQmlElement (this=0x555d8f929d50, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/include/QtQml/../../src/qml/qml/qqmlprivate.h:101
#29 QQmlPrivate::QQmlElement<QQuickMouseArea>::~QQmlElement (this=0x555d8f929d50, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#30 0x00007f737247601b in QObjectPrivate::deleteChildren (this=this@entry=0x555d900371a0) at kernel/qobject.cpp:1997
#31 0x00007f737247ed44 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#32 0x00007f7373d15b6a in QQuickItem::~QQuickItem (this=0x555d8f351dd0, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.cpp:2441
#33 0x00007f7373d33b05 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x555d8f351dd0, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/include/QtQml/../../src/qml/qml/qqmlprivate.h:101
#34 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x555d8f351dd0, __in_chrg=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#35 0x00007f7372478920 in QObject::event (this=this@entry=0x555d8f351dd0, e=e@entry=0x555d8f659770) at kernel/qobject.cpp:1242
#36 0x00007f7373d132cb in QQuickItem::event (this=0x555d8f351dd0, ev=0x555d8f659770) at /usr/src/debug/libqt5-qtdeclarative-5.11.2-1.1.x86_64/src/quick/items/qquickitem.cpp:8034
#37 0x00007f73732934a1 in QApplicationPrivate::notify_helper (this=this@entry=0x555d8ce95c40, receiver=receiver@entry=0x555d8f351dd0, e=e@entry=0x555d8f659770) at kernel/qapplication.cpp:3728
#38 0x00007f737329aaf0 in QApplication::notify (this=0x7ffc84bdc510, receiver=0x555d8f351dd0, e=0x555d8f659770) at kernel/qapplication.cpp:3487
#39 0x00007f737244ee09 in QCoreApplication::notifyInternal2 (receiver=0x555d8f351dd0, event=0x555d8f659770) at ../../include/QtCore/5.11.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:307
#40 0x00007f7372451dfb in QCoreApplication::sendEvent (event=0x555d8f659770, receiver=<optimized out>) at kernel/qcoreapplication.h:234
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x555d8ce75600) at kernel/qcoreapplication.cpp:1745
#42 0x00007f73724a1493 in postEventSourceDispatch (s=0x555d8cf57d80) at kernel/qeventdispatcher_glib.cpp:276
#43 0x00007f736fb51c15 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#44 0x00007f736fb51fd8 in ?? () from /usr/lib64/libglib-2.0.so.0
#45 0x00007f736fb5206c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#46 0x00007f73724a0ac3 in QEventDispatcherGlib::processEvents (this=0x555d8cf073f0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#47 0x00007f736c2a49d1 in QPAEventDispatcherGlib::processEvents (this=0x555d8cf073f0, flags=...) at qeventdispatcher_glib.cpp:69
#48 0x00007f737244dadb in QEventLoop::exec (this=this@entry=0x7ffc84bdc440, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#49 0x00007f7372455c52 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#50 0x0000555d8cad3b13 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/discover-5.14.0-2.1.x86_64/discover/main.cpp:156
[Inferior 1 (process 11613) detached]

The reporter indicates this bug may be a duplicate of or related to bug 397863.

Possible duplicates by query: bug 399934, bug 399771, bug 399761, bug 397955, bug 397863.

Reported using DrKonqi
Comment 1 Aleix Pol 2018-10-23 13:04:35 UTC 
Please update to stable KF5.