Bug 419584

Summary: Discover crashes after removing flathub from sources
Product: [Applications] Discover Reporter: Julien Stengel <julien.stengel>
Component: discoverAssignee: Dan Leinir Turthra Jensen <leinir>
Status: RESOLVED FIXED    
Severity: crash CC: aleixpol
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.18.3   
Target Milestone: ---   
Platform: openSUSE   
OS: Linux   
Latest Commit: https://commits.kde.org/discover/13e034256c7713f9a3e161585d6a762bf7e4b547 Version Fixed/Implemented In: 5.18.4
Sentry Crash Report:

Description Julien Stengel 2020-04-03 12:39:42 UTC 
Application: plasma-discover (5.18.3)

Qt Version: 5.14.1
Frameworks Version: 5.68.0
Operating System: Linux 5.5.13-1-default x86_64
Windowing system: X11
Distribution: "openSUSE Tumbleweed"

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

right before the removal attempt, I deinstalled flatpack-packages, which didn't work with openSuse.
These deinstallations also didn't work at first. I rebootet, then deinstalled the packages and then tried to remove the flathub resource. This then crashed Discover every time after restarting Discover.

The packages, that were deinstalled (because they didn't run) were:
Gitkraken
IntelliJ IDEA Ultimate
Steam (from flathub resource)

Also worth mentioning might be: these programs didn't display their icons correctly after installation. Only after rebooting were these icons displayed correctly

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efcbf954900 (LWP 2146))]

Thread 16 (Thread 0x7efca27fc700 (LWP 3976)):
#0  0x00007efcc46cbacf in poll () from /lib64/libc.so.6
#1  0x00007efcc0ca533e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efbd86071e0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efca27fbca0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#5  0x00007efcc24785ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#6  0x00007efcc2479698 in QThreadPrivate::start (arg=0x55ee29b863f0) at thread/qthread_unix.cpp:342
#7  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#8  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 15 (Thread 0x7efc2a7fc700 (LWP 3781)):
#0  0x00007ffebddec702 in ?? ()
#1  0x00007ffebddec8a8 in clock_gettime ()
#2  0x00007efcc469dcf1 in clock_gettime@GLIBC_2.2.5 () from /lib64/libc.so.6
#3  0x00007efcc26a5511 in qt_clock_gettime (ts=0x7efc2a7fba10, clock=1) at kernel/qelapsedtimer_unix.cpp:175
#4  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#5  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#6  0x00007efcc26a3e29 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7efbec004660) at kernel/qtimerinfo_unix.cpp:91
#7  0x00007efcc26a43f5 in QTimerInfoList::timerWait (this=0x7efbec004660, tm=...) at kernel/qtimerinfo_unix.cpp:388
#8  0x00007efcc26a5fbc in timerSourcePrepareHelper (timeout=0x7efc2a7fbad4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:138
#9  idleTimerSourcePrepare (source=<optimized out>, timeout=0x7efc2a7fbad4) at kernel/qeventdispatcher_glib.cpp:213
#10 0x00007efcc0ca48ca in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#11 0x00007efcc0ca526b in ?? () from /usr/lib64/libglib-2.0.so.0
#12 0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#13 0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efbec004290, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#14 0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efc2a7fbca0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#15 0x00007efcc24785ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#16 0x00007efcc2479698 in QThreadPrivate::start (arg=0x55ee26575a70) at thread/qthread_unix.cpp:342
#17 0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#18 0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7efc2affd700 (LWP 3745)):
#0  0x00007efcc46d0f59 in syscall () from /lib64/libc.so.6
#1  0x00007efcc247b841 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=<optimized out>, op=0, addr=<optimized out>) at thread/qfutex_p.h:133
#2  QtLinuxFutex::futexWait<QBasicAtomicInteger<unsigned int> > (expectedValue=<optimized out>, futex=...) at thread/qfutex_p.h:135
#3  futexSemaphoreTryAcquire_loop<false> (timeout=-1, nn=8589934593, curValue=<optimized out>, u=...) at thread/qsemaphore.cpp:219
#4  futexSemaphoreTryAcquire<false> (timeout=-1, n=<optimized out>, u=...) at thread/qsemaphore.cpp:262
#5  QSemaphore::acquire (this=0x7efcc1e555a0, n=<optimized out>) at thread/qsemaphore.cpp:326
#6  0x00007efcc1d829b4 in ?? () from /usr/lib64/libQt5Network.so.5
#7  0x00007efcc2479698 in QThreadPrivate::start (arg=0x7efcc1e55580) at thread/qthread_unix.cpp:342
#8  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#9  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7efc297fa700 (LWP 3744)):
#0  0x00007efcc0ca1fd9 in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x00007efcc0ca35a5 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca4803 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc0ca526b in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efc04005690, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efc297f9ca0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#7  0x00007efcc24785ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#8  0x00007efcc2479698 in QThreadPrivate::start (arg=0x7efc9000fca0) at thread/qthread_unix.cpp:342
#9  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#10 0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7efca37fe700 (LWP 2293)):
#0  0x00007efcc46cbacf in poll () from /lib64/libc.so.6
#1  0x00007efcc0ca533e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca56a3 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc068d1d6 in ?? () from /usr/lib64/libgio-2.0.so.0
#4  0x00007efcc0cce1ae in ?? () from /usr/lib64/libglib-2.0.so.0
#5  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#6  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7efca8d0c700 (LWP 2292)):
#0  0x00007efcc46c74fc in read () from /lib64/libc.so.6
#1  0x00007efcc0cec21f in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca4e97 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc0ca52e2 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007efcc0ca54b1 in ?? () from /usr/lib64/libglib-2.0.so.0
#6  0x00007efcc0cce1ae in ?? () from /usr/lib64/libglib-2.0.so.0
#7  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#8  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7efca997c700 (LWP 2284)):
#0  0x00007efcc46cbacf in poll () from /lib64/libc.so.6
#1  0x00007efcc0ca533e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efc90000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efca997bca0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#5  0x00007efcc24785ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#6  0x00007efcc2479698 in QThreadPrivate::start (arg=0x55ee26a69650) at thread/qthread_unix.cpp:342
#7  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#8  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7efcaa5ed700 (LWP 2257)):
#0  0x00007efcc0cf0644 in g_mutex_unlock () from /usr/lib64/libglib-2.0.so.0
#1  0x00007efcc0ca441f in g_main_context_acquire () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca51f5 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efc8c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efcaa5ecc60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#6  0x00007efcc24785ce in QThread::exec (this=this@entry=0x55ee27d034d0) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#7  0x00007efcc407d0e6 in QQuickPixmapReader::run (this=0x55ee27d034d0) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/quick/util/qquickpixmapcache.cpp:987
#8  0x00007efcc2479698 in QThreadPrivate::start (arg=0x55ee27d034d0) at thread/qthread_unix.cpp:342
#9  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#10 0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7efcab7fe700 (LWP 2245)):
#0  0x00007efcc16b0795 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007efcb5328c5b in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007efcb5328ad7 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#4  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7efcabfff700 (LWP 2244)):
#0  0x00007efcc16b0795 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007efcb5328c5b in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007efcb5328ad7 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#4  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7efca3fff700 (LWP 2243)):
#0  0x00007efcc16b0795 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007efcb5328c5b in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007efcb5328ad7 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#4  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7efcb4c27700 (LWP 2242)):
#0  0x00007efcc16b0795 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007efcb5328c5b in ?? () from /usr/lib64/dri/i965_dri.so
#2  0x00007efcb5328ad7 in ?? () from /usr/lib64/dri/i965_dri.so
#3  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#4  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7efcb75ef700 (LWP 2199)):
#0  0x00007efcc46c74fc in read () from /lib64/libc.so.6
#1  0x00007efcc0cec21f in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca4e97 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc0ca52e2 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efcac000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efcb75eec80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#7  0x00007efcc24785ce in QThread::exec (this=this@entry=0x55ee26649b70) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#8  0x00007efcc33a36e5 in QQmlThreadPrivate::run (this=0x55ee26649b70) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qml/qml/ftw/qqmlthread.cpp:155
#9  0x00007efcc2479698 in QThreadPrivate::start (arg=0x55ee26649b70) at thread/qthread_unix.cpp:342
#10 0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#11 0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7efcbc9fa700 (LWP 2186)):
#0  0x00007efcc46cbacf in poll () from /lib64/libc.so.6
#1  0x00007efcc0ca533e in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007efcc26a5c0b in QEventDispatcherGlib::processEvents (this=0x7efcb0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7efcbc9f9c70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#5  0x00007efcc24785ce in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#6  0x00007efcc3bb7507 in ?? () from /usr/lib64/libQt5DBus.so.5
#7  0x00007efcc2479698 in QThreadPrivate::start (arg=0x7efcc3c39da0) at thread/qthread_unix.cpp:342
#8  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#9  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7efcbd8a7700 (LWP 2174)):
#0  0x00007efcc46cbacf in poll () from /lib64/libc.so.6
#1  0x00007efcc0bb2772 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007efcc0bb343a in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007efcbdaabab0 in QXcbEventQueue::run (this=0x55ee26521f30) at qxcbeventqueue.cpp:228
#4  0x00007efcc2479698 in QThreadPrivate::start (arg=0x55ee26521f30) at thread/qthread_unix.cpp:342
#5  0x00007efcc16a9efa in start_thread () from /lib64/libpthread.so.0
#6  0x00007efcc46d63bf in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7efcbf954900 (LWP 2146)):
[KCrash Handler]
#6  0x00007efca90ec768 in FlatpakResource::sourceIcon (this=<optimized out>) at /usr/include/qt5/QtCore/qstring.h:1051
#7  0x00007efcc44d75ee in AbstractResource::qt_static_metacall (_o=_o@entry=0x55ee27b69ef0, _c=_c@entry=QMetaObject::ReadProperty, _id=_id@entry=30, _a=_a@entry=0x7ffebddc7460) at /usr/src/debug/discover-5.18.3-1.1.x86_64/build/libdiscover/DiscoverCommon_autogen/3YJK5W5UP7/moc_AbstractResource.cpp:374
#8  0x00007efcc44d7a2b in AbstractResource::qt_metacall (this=0x55ee27b69ef0, _c=QMetaObject::ReadProperty, _id=30, _a=0x7ffebddc7460) at /usr/src/debug/discover-5.18.3-1.1.x86_64/build/libdiscover/DiscoverCommon_autogen/3YJK5W5UP7/moc_AbstractResource.cpp:425
#9  0x00007efca90f8e15 in FlatpakResource::qt_metacall (this=0x55ee27b69ef0, _c=QMetaObject::ReadProperty, _id=<optimized out>, _a=0x7ffebddc7460) at /usr/src/debug/discover-5.18.3-1.1.x86_64/build/libdiscover/backends/FlatpakBackend/flatpak-backend_autogen/EWIEGA46WW/moc_FlatpakResource.cpp:152
#10 0x00007efcc265b3e3 in QMetaProperty::read (this=this@entry=0x7ffebddc74f0, object=object@entry=0x55ee27b69ef0) at kernel/qmetaobject.cpp:3151
#11 0x00007efcc44b8fa3 in ResourcesProxyModel::roleToValue (this=<optimized out>, resource=0x55ee27b69ef0, role=<optimized out>) at /usr/src/debug/discover-5.18.3-1.1.x86_64/libdiscover/resources/ResourcesProxyModel.cpp:450
#12 0x00007efcc44b91ca in ResourcesProxyModel::data (this=<optimized out>, index=..., role=<optimized out>) at /usr/src/debug/discover-5.18.3-1.1.x86_64/libdiscover/resources/ResourcesProxyModel.cpp:408
#13 0x00007efcc19676ab in QModelIndex::data (arole=276, this=0x7ffebddc75b0) at /usr/include/qt5/QtCore/qabstractitemmodel.h:460
#14 QQmlDMAbstractItemModelData::value (role=276, this=0x55ee2a866d30) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qmlmodels/qqmladaptormodel.cpp:412
#15 QQmlDMCachedModelData::metaCall (this=0x55ee2a866d30, call=<optimized out>, id=<optimized out>, arguments=0x7ffebddc7670) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qmlmodels/qqmladaptormodel.cpp:280
#16 0x00007efcc265b3e3 in QMetaProperty::read (this=this@entry=0x7ffebddc7720, object=object@entry=0x55ee2a866d30) at kernel/qmetaobject.cpp:3151
#17 0x00007efcbc0fb516 in DelegateRecycler::setSourceComponent (this=0x55ee2ab7e940, component=<optimized out>) at /usr/src/debug/kirigami2-5.68.0-1.1.x86_64/src/delegaterecycler.cpp:271
#18 0x00007efcbc107fb3 in DelegateRecycler::qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _c=<optimized out>, _o=0x55ee2ab7e940) at /usr/src/debug/kirigami2-5.68.0-1.1.x86_64/build/src/kirigamiplugin_autogen/EWIEGA46WW/moc_delegaterecycler.cpp:264
#19 DelegateRecycler::qt_static_metacall (_o=0x55ee2ab7e940, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/kirigami2-5.68.0-1.1.x86_64/build/src/kirigamiplugin_autogen/EWIEGA46WW/moc_delegaterecycler.cpp:220
#20 0x00007efcc336365f in QQmlPropertyData::writeProperty (flags=..., value=0x7ffebddc78c8, target=<optimized out>, this=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/include/QtQml/5.14.1/QtQml/private/../../../../../src/qml/qml/qqmlpropertydata_p.h:286
#21 QObjectPointerBinding::write (this=0x55ee2b2fc2b0, result=..., isUndefined=<optimized out>, flags=...) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qml/qml/qqmlbinding.cpp:726
#22 0x00007efcc3364cef in QQmlNonbindingBinding::doUpdate (this=0x55ee2b2fc2b0, watcher=..., flags=..., scope=...) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/include/QtQml/5.14.1/QtQml/private/../../../../../src/qml/jsruntime/qv4scopedvalue_p.h:239
#23 0x00007efcc3361b82 in QQmlBinding::update (this=0x55ee2b2fc2b0, flags=...) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qml/qml/qqmlbinding.cpp:186
#24 0x00007efcc337310e in QQmlObjectCreator::finalize (this=0x55ee2b253910, interrupt=...) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qml/qml/qqmlobjectcreator.cpp:1390
#25 0x00007efcc32fdb9a in QQmlIncubatorPrivate::incubate (this=0x55ee26f62170, i=...) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qml/qml/qqmlincubator.cpp:342
#26 0x00007efcc32fe0e3 in QQmlEnginePrivate::incubate (this=0x55ee265d0200, i=..., forContext=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qml/qml/qqmlincubator.cpp:88
#27 0x00007efcc1978467 in QQmlDelegateModelPrivate::object (this=0x55ee2abdbaa0, group=QQmlListCompositor::Default, index=0, incubationMode=<optimized out>) at /usr/include/c++/9/bits/atomic_base.h:413
#28 0x00007efcc1978604 in QQmlDelegateModel::object (this=<optimized out>, index=0, incubationMode=QQmlIncubator::Synchronous) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/qmlmodels/qqmldelegatemodel.cpp:1119
#29 0x00007efcc4281736 in QQuickItemViewPrivate::createItem (this=this@entry=0x55ee2ae239a0, modelIndex=modelIndex@entry=0, incubationMode=incubationMode@entry=QQmlIncubator::Synchronous) at /usr/include/c++/9/bits/atomic_base.h:413
#30 0x00007efcc42947e4 in QQuickListViewPrivate::applyInsertionChange (this=0x55ee2ae239a0, change=..., insertResult=0x7ffebddc7fc0, addedItems=0x7ffebddc7fa8, movingIntoView=0x7ffebddc7fb0) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/quick/items/qquicklistview.cpp:3381
#31 0x00007efcc4285015 in QQuickItemViewPrivate::applyModelChanges (this=this@entry=0x55ee2ae239a0, totalInsertionResult=totalInsertionResult@entry=0x7ffebddc80b0, totalRemovalResult=totalRemovalResult@entry=0x7ffebddc80e0) at /usr/include/qt5/QtCore/qarraydata.h:211
#32 0x00007efcc42835b0 in QQuickItemViewPrivate::layout (this=0x55ee2ae239a0) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/quick/items/qquickitemview.cpp:1865
#33 0x00007efcc4197ca3 in QQuickWindowPrivate::polishItems (this=this@entry=0x55ee267ec5f0) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/quick/items/qquickwindow.cpp:316
#34 0x00007efcc4119c23 in QSGGuiThreadRenderLoop::renderWindow (this=0x55ee267e2860, window=<optimized out>) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/quick/scenegraph/qsgrenderloop.cpp:667
#35 0x00007efcc41a4463 in QQuickWindow::event (this=0x55ee266765a0, e=0x7ffebddc85a0) at /usr/src/debug/libqt5-qtdeclarative-5.14.1-1.3.x86_64/src/quick/items/qquickwindow.cpp:1754
#36 0x00007efcc366ecaf in QApplicationPrivate::notify_helper (this=this@entry=0x55ee264de800, receiver=receiver@entry=0x55ee266765a0, e=e@entry=0x7ffebddc85a0) at kernel/qapplication.cpp:3684
#37 0x00007efcc3677df0 in QApplication::notify (this=0x7ffebddc8ba0, receiver=0x55ee266765a0, e=0x7ffebddc85a0) at kernel/qapplication.cpp:3430
#38 0x00007efcc264f002 in QCoreApplication::notifyInternal2 (receiver=0x55ee266765a0, event=0x7ffebddc85a0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#39 0x00007efcc2a583e4 in QPlatformWindow::deliverUpdateRequest (this=<optimized out>) at kernel/qplatformwindow.cpp:796
#40 QPlatformWindow::windowEvent (this=<optimized out>, event=<optimized out>) at kernel/qplatformwindow.cpp:476
#41 0x00007efcc3677b6b in QApplication::notify (this=0x7ffebddc8ba0, receiver=0x55ee266765a0, e=0x7ffebddc8830) at kernel/qapplication.cpp:2874
#42 0x00007efcc264f002 in QCoreApplication::notifyInternal2 (receiver=0x55ee266765a0, event=0x7ffebddc8830) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#43 0x00007efcc26a4fc0 in QTimerInfoList::activateTimers (this=0x55ee265c5930) at kernel/qtimerinfo_unix.cpp:643
#44 0x00007efcc26a587c in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:183
#45 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:230
#46 0x00007efcc0ca5048 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#47 0x00007efcc0ca53d0 in ?? () from /usr/lib64/libglib-2.0.so.0
#48 0x00007efcc0ca545f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#49 0x00007efcc26a5bee in QEventDispatcherGlib::processEvents (this=0x55ee265ce170, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#50 0x00007efcc264db9b in QEventLoop::exec (this=this@entry=0x7ffebddc8a70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#51 0x00007efcc2655972 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#52 0x000055ee246dcfff in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/discover-5.18.3-1.1.x86_64/discover/main.cpp:183
[Inferior 1 (process 2146) detached]

Possible duplicates by query: bug 419057, bug 418928, bug 418848, bug 418815, bug 373019.

Reported using DrKonqi
Comment 1 Aleix Pol 2020-04-03 14:00:41 UTC 
It's fixed for 5.18.4, sorry for the inconvenience.