Bug 399761

Summary: Discover crash after clicking the "Applications" link in the left window.
Product: [Applications] Discover Reporter: Todd <cheezyeggrollz>
Component: discoverAssignee: Aleix Pol <aleixpol>
Status: RESOLVED DUPLICATE    
Severity: crash CC: fauno077, nate
Priority: NOR Keywords: drkonqi
Version: 5.14.0   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: New crash information added by DrKonqi

Description Todd 2018-10-13 15:46:30 UTC 
Application: plasma-discover (5.14.0)

Qt Version: 5.11.1
Frameworks Version: 5.50.0
Operating System: Linux 4.15.0-36-generic x86_64
Distribution: KDE neon User Edition 5.14

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

Open Discover, clicked the "Applications" link on the left under the search bar and Discover immediately crashed. 

Retried 3 consecutive times and crash occured 3 times.

KDE Neon installed in Gnome Boxes VM:
Operating System: KDE neon 5.14
KDE Plasma Version: 5.14.0
Qt Version: 5.11.1
KDE Frameworks Version: 5.50.0
Kernel Version: 4.15.0-36-generic
OS Type: 64-bit
Processors: 4 × Intel Core Processor (Broadwell, no TSX, IBRS)
Memory: 3.8 GiB of RAM

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f13d3a89c80 (LWP 2497))]

Thread 14 (Thread 0x7f136d2b1700 (LWP 2521)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f13cf703155 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=3, op=0, addr=<optimized out>) at thread/qfutex_p.h:92
#2  QtLinuxFutex::futexWait<QBasicAtomicPointer<QMutexData> > (expectedValue=<optimized out>, 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=0x7f13cfd68ac0 <_q_ObjectMutexPool>) at thread/qmutex_linux.cpp:162
#5  0x00007f13cf70333b in QMutex::lock (this=this@entry=0x7f13cfd68ac0 <_q_ObjectMutexPool>) at thread/qmutex.cpp:229
#6  0x00007f13cf9140f6 in QOrderedMutexLocker::relock (mtx2=0x7f13cfd68ac0 <_q_ObjectMutexPool>, mtx1=0x7f13cfd68ac8 <_q_ObjectMutexPool+8>) at ../../include/QtCore/5.11.1/QtCore/private/../../../../../src/corelib/thread/qorderedmutexlocker_p.h:109
#7  QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:991
#8  0x00007f13cced8287 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#9  0x00007f13cce7bace in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#10 0x00007f13cf90d5fb in QObject::event (this=0x7f135c001bc0, e=<optimized out>) at kernel/qobject.cpp:1273
#11 0x00007f13d0ef4e8c in QApplicationPrivate::notify_helper (this=this@entry=0x55bbca704520, receiver=receiver@entry=0x7f135c001bc0, e=e@entry=0x7f136d2b0b50) at kernel/qapplication.cpp:3727
#12 0x00007f13d0efc45f in QApplication::notify (this=0x7ffc48d45730, receiver=0x7f135c001bc0, e=0x7f136d2b0b50) at kernel/qapplication.cpp:3486
#13 0x00007f13cf8ddab8 in QCoreApplication::notifyInternal2 (receiver=0x7f135c001bc0, event=event@entry=0x7f136d2b0b50) at kernel/qcoreapplication.cpp:1048
#14 0x00007f13cf936f0e in QCoreApplication::sendEvent (event=0x7f136d2b0b50, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#15 QTimerInfoList::activateTimers (this=0x7f135c001f90) at kernel/qtimerinfo_unix.cpp:643
#16 0x00007f13cf9376d1 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
#17 0x00007f13c956c287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f13c956c4c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f13cf937a9b in QEventDispatcherGlib::processEvents (this=0x7f135c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#21 0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7f136d2b0da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#22 0x00007f13cf706b8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#23 0x00007f13cf711aab in QThreadPrivate::start (arg=0x55bbcc3b7f60) at thread/qthread_unix.cpp:367
#24 0x00007f13cb7076db in start_thread (arg=0x7f136d2b1700) at pthread_create.c:463
#25 0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f137d7aa700 (LWP 2511)):
#0  0x00007f13ceff80b4 in __GI___libc_read (fd=20, buf=0x7f137d7a9b90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f13c95b0a00 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956bf27 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f13c956c3e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f13cf937a9b in QEventDispatcherGlib::processEvents (this=0x7f1374000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7f137d7a9da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#7  0x00007f13cf706b8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#8  0x00007f13cf711aab in QThreadPrivate::start (arg=0x55bbcc3e3530) at thread/qthread_unix.cpp:367
#9  0x00007f13cb7076db in start_thread (arg=0x7f137d7aa700) at pthread_create.c:463
#10 0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f137f5fa700 (LWP 2510)):
#0  0x00007f13ceffcbf9 in __GI___poll (fds=0x55bbcb00a6a0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f13c956c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956c7d2 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f138bd2ff66 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f13c9593e85 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f13cb7076db in start_thread (arg=0x7f137f5fa700) at pthread_create.c:463
#6  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f137fdfb700 (LWP 2509)):
#0  0x00007f13ceff80b4 in __GI___libc_read (fd=15, buf=0x7f137fdface0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f13c95b0a00 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956bf27 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f13c956c3e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f13c956c591 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f13c9593e85 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f13cb7076db in start_thread (arg=0x7f137fdfb700) at pthread_create.c:463
#8  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f138a739700 (LWP 2507)):
#0  0x00007f13ceffcbf9 in __GI___poll (fds=0x7f1380004a10, nfds=1, timeout=9355) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f13c956c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f13cf937a9b in QEventDispatcherGlib::processEvents (this=0x7f1380000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7f138a738da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f13cf706b8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f13cf711aab in QThreadPrivate::start (arg=0x55bbcaf10960) at thread/qthread_unix.cpp:367
#7  0x00007f13cb7076db in start_thread (arg=0x7f138a739700) at pthread_create.c:463
#8  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f13a21cd700 (LWP 2506)):
#0  0x00007f13ceffcbf9 in __GI___poll (fds=0x7f1384004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f13c956c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f13cf937a9b in QEventDispatcherGlib::processEvents (this=0x7f1384000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7f13a21ccd30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f13cf706b8a in QThread::exec (this=this@entry=0x55bbcadef030) at thread/qthread.cpp:525
#6  0x00007f13d2b02906 in QQuickPixmapReader::run (this=0x55bbcadef030) at util/qquickpixmapcache.cpp:934
#7  0x00007f13cf711aab in QThreadPrivate::start (arg=0x55bbcadef030) at thread/qthread_unix.cpp:367
#8  0x00007f13cb7076db in start_thread (arg=0x7f13a21cd700) at pthread_create.c:463
#9  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f13a35e9700 (LWP 2505)):
#0  0x00007f13cb70d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bbca94a01c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55bbca949fc8, cond=0x55bbca949ff0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55bbca949ff0, mutex=0x55bbca949fc8) at pthread_cond_wait.c:655
#3  0x00007f13a96cfd5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f13a96cfbd7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f13cb7076db in start_thread (arg=0x7f13a35e9700) at pthread_create.c:463
#6  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f139bfff700 (LWP 2504)):
#0  0x00007f13cb70d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bbca949eb4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55bbca949e60, cond=0x55bbca949e88) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55bbca949e88, mutex=0x55bbca949e60) at pthread_cond_wait.c:655
#3  0x00007f13a96cfd5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f13a96cfbd7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f13cb7076db in start_thread (arg=0x7f139bfff700) at pthread_create.c:463
#6  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f13a3dea700 (LWP 2503)):
#0  0x00007f13cb70d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bbca949d4c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55bbca949cf8, cond=0x55bbca949d20) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55bbca949d20, mutex=0x55bbca949cf8) at pthread_cond_wait.c:655
#3  0x00007f13a96cfd5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f13a96cfbd7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f13cb7076db in start_thread (arg=0x7f13a3dea700) at pthread_create.c:463
#6  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f13a45eb700 (LWP 2502)):
#0  0x00007f13cb70d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bbca949be0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55bbca949b90, cond=0x55bbca949bb8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55bbca949bb8, mutex=0x55bbca949b90) at pthread_cond_wait.c:655
#3  0x00007f13a96cfd5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f13a96cfbd7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f13cb7076db in start_thread (arg=0x7f13a45eb700) at pthread_create.c:463
#6  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f13b35ef700 (LWP 2501)):
#0  0x00007f13ceff80b4 in __GI___libc_read (fd=9, buf=0x7f13b35eeb70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f13c95b0a00 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956bf27 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f13c956c3e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f13cf937a9b in QEventDispatcherGlib::processEvents (this=0x7f13ac000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7f13b35eed80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#7  0x00007f13cf706b8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#8  0x00007f13d02ab8b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f13cf711aab in QThreadPrivate::start (arg=0x55bbca7d5040) at thread/qthread_unix.cpp:367
#10 0x00007f13cb7076db in start_thread (arg=0x7f13b35ef700) at pthread_create.c:463
#11 0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f13b8968700 (LWP 2500)):
#0  0x00007f13ceffcbf9 in __GI___poll (fds=0x7f13b4019190, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f13c956c439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f13cf937a9b in QEventDispatcherGlib::processEvents (this=0x7f13b4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7f13b8967d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f13cf706b8a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f13d1604e45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f13cf711aab in QThreadPrivate::start (arg=0x7f13d187cd60) at thread/qthread_unix.cpp:367
#8  0x00007f13cb7076db in start_thread (arg=0x7f13b8968700) at pthread_create.c:463
#9  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f13c102b700 (LWP 2499)):
#0  0x00007f13ceffcbf9 in __GI___poll (fds=0x7f13c102aca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f13c9303747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f13c930536a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f13c3fec129 in QXcbEventReader::run (this=0x55bbca6fe400) at qxcbconnection.cpp:1388
#4  0x00007f13cf711aab in QThreadPrivate::start (arg=0x55bbca6fe400) at thread/qthread_unix.cpp:367
#5  0x00007f13cb7076db in start_thread (arg=0x7f13c102b700) at pthread_create.c:463
#6  0x00007f13cf00988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f13d3a89c80 (LWP 2497)):
[KCrash Handler]
#6  QMetaObjectPrivate::disconnect (sender=0x1, signal_index=53, smeta=0x7f13bb13d340 <QQuickMenu::staticMetaObject>, receiver=0xc1, method_index=-1, slot=0x7ffc48d449b0, disconnectType=QMetaObjectPrivate::DisconnectAll) at kernel/qobject.cpp:3424
#7  0x00007f13cf90f7a7 in QObject::disconnectImpl (sender=0x1, signal=signal@entry=0x7ffc48d449a0, receiver=receiver@entry=0xc1, slot=slot@entry=0x7ffc48d449b0, senderMetaObject=senderMetaObject@entry=0x7f13bb13d340 <QQuickMenu::staticMetaObject>) at kernel/qobject.cpp:4986
#8  0x00007f13baeae0b1 in QObject::disconnect<void (QQuickMenu::*)(bool), void (QQuickMenu::*)(bool)> (slot=(void (QQuickMenu::*)(QQuickMenu * const, bool)) 0x7f13baead820 <QQuickMenu::setCascade(bool)>, receiver=0xc1, signal=(void (QQuickMenu::*)(QQuickMenu * const, bool)) 0x7f13baeacc10 <QQuickMenu::cascadeChanged(bool)>, sender=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject.h:367
#9  QQuickMenuPrivate::setParentMenu (this=0x55bbcce81930, parent=parent@entry=0x0) at qquickmenu.cpp:486
#10 0x00007f13baeaf5cb in QQuickMenuPrivate::removeItem (this=0x55bbcaae5d40, index=<optimized out>, item=<optimized out>) at qquickmenu.cpp:238
#11 0x00007f13d2bc2d26 in QQuickItemPrivate::itemChange (this=this@entry=0x55bbccbcc5b0, change=change@entry=QQuickItem::ItemParentHasChanged, data=...) at items/qquickitem.cpp:6206
#12 0x00007f13d2bc9157 in QQuickItem::setParentItem (this=0x55bbccd3a5b0, parentItem=parentItem@entry=0x0) at items/qquickitem.cpp:2791
#13 0x00007f13d2bcaa6c in QQuickItem::~QQuickItem (this=0x55bbcc5409b0, __in_chrg=<optimized out>) at items/qquickitem.cpp:2391
#14 0x00007f13d2bcad59 in QQuickItem::~QQuickItem (this=0x55bbcc5409b0, __in_chrg=<optimized out>) at items/qquickitem.cpp:2439
#15 0x00007f13cf90a6ab in QObjectPrivate::deleteChildren (this=this@entry=0x55bbce53e990) at kernel/qobject.cpp:1997
#16 0x00007f13cf91414b in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#17 0x00007f13d2bcab7b in QQuickItem::~QQuickItem (this=0x55bbcca90a70, __in_chrg=<optimized out>) at items/qquickitem.cpp:2378
#18 0x00007f13d2be7e15 in QQmlPrivate::QQmlElement<QQuickListView>::~QQmlElement (this=0x55bbcca90a70, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#19 QQmlPrivate::QQmlElement<QQuickListView>::~QQmlElement (this=0x55bbcca90a70, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#20 0x00007f13cf90a6ab in QObjectPrivate::deleteChildren (this=this@entry=0x55bbcaae5d40) at kernel/qobject.cpp:1997
#21 0x00007f13cf91414b in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#22 0x00007f13ab72b25d in QQuickMenu::~QQuickMenu (this=0x55bbcc52fe70, __in_chrg=<optimized out>) at ../../../include/QtQuickTemplates2/5.11.1/QtQuickTemplates2/private/../../../../../src/quicktemplates2/qquickmenu_p.h:63
#23 QQmlPrivate::QQmlElement<QQuickMenu>::~QQmlElement (this=0x55bbcc52fe70, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:103
#24 QQmlPrivate::QQmlElement<QQuickMenu>::~QQmlElement (this=0x55bbcc52fe70, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:103
#25 0x00007f13cf90a6ab in QObjectPrivate::deleteChildren (this=this@entry=0x55bbcce613d0) at kernel/qobject.cpp:1997
#26 0x00007f13cf91414b in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#27 0x00007f13d2bcab7b in QQuickItem::~QQuickItem (this=0x55bbccdf9670, __in_chrg=<optimized out>) at items/qquickitem.cpp:2378
#28 0x00007f13d2be8065 in QQmlPrivate::QQmlElement<QQuickMouseArea>::~QQmlElement (this=0x55bbccdf9670, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#29 QQmlPrivate::QQmlElement<QQuickMouseArea>::~QQmlElement (this=0x55bbccdf9670, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#30 0x00007f13cf90a6ab in QObjectPrivate::deleteChildren (this=this@entry=0x55bbcc5cf980) at kernel/qobject.cpp:1997
#31 0x00007f13cf91414b in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1025
#32 0x00007f13d2bcab7b in QQuickItem::~QQuickItem (this=0x55bbccf5c390, __in_chrg=<optimized out>) at items/qquickitem.cpp:2378
#33 0x00007f13d2be76c5 in QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55bbccf5c390, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#34 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement (this=0x55bbccf5c390, __in_chrg=<optimized out>) at ../../include/QtQml/../../src/qml/qml/qqmlprivate.h:103
#35 0x00007f13cf90d660 in QObject::event (this=this@entry=0x55bbccf5c390, e=e@entry=0x55bbcc640970) at kernel/qobject.cpp:1242
#36 0x00007f13d2bc7aeb in QQuickItem::event (this=0x55bbccf5c390, ev=0x55bbcc640970) at items/qquickitem.cpp:8003
#37 0x00007f13d0ef4e8c in QApplicationPrivate::notify_helper (this=this@entry=0x55bbca704520, receiver=receiver@entry=0x55bbccf5c390, e=e@entry=0x55bbcc640970) at kernel/qapplication.cpp:3727
#38 0x00007f13d0efc45f in QApplication::notify (this=0x7ffc48d45730, receiver=0x55bbccf5c390, e=0x55bbcc640970) at kernel/qapplication.cpp:3486
#39 0x00007f13cf8ddab8 in QCoreApplication::notifyInternal2 (receiver=0x55bbccf5c390, event=event@entry=0x55bbcc640970) at kernel/qcoreapplication.cpp:1048
#40 0x00007f13cf8e05fd in QCoreApplication::sendEvent (event=0x55bbcc640970, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55bbca703f30) at kernel/qcoreapplication.cpp:1745
#42 0x00007f13cf8e0bb8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1599
#43 0x00007f13cf938453 in postEventSourceDispatch (s=0x55bbca75d090) at kernel/qeventdispatcher_glib.cpp:276
#44 0x00007f13c956c287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f13c956c4c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f13c956c54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f13cf937a7f in QEventDispatcherGlib::processEvents (this=0x55bbca7577e0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#48 0x00007f13c4076ed1 in QPAEventDispatcherGlib::processEvents (this=0x55bbca7577e0, flags=...) at qeventdispatcher_glib.cpp:69
#49 0x00007f13cf8dbdea in QEventLoop::exec (this=this@entry=0x7ffc48d45670, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#50 0x00007f13cf8e4fa0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#51 0x000055bbc84a4808 in main (argc=<optimized out>, argv=<optimized out>) at ./discover/main.cpp:156

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

Possible duplicates by query: bug 397955.

Reported using DrKonqi
Comment 1 fauno077 2018-10-13 18:21:14 UTC 
Created attachment 115632 [details]
New crash information added by DrKonqi

plasma-discover (5.14.0) using Qt 5.11.2

- What I was doing when the application crashed:

Open Discover, click Applications in the side menu. If it doesn't crash the first time, it will crash the second or the third, not much more later

-- Backtrace (Reduced):
#6  0x00007f8d2cf93016 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f8d2cf93538 in QObject::disconnectImpl(QObject const*, void**, QObject const*, void**, QMetaObject const*) () at /usr/lib/libQt5Core.so.5
#8  0x00007f8d24d7b26d in QQuickMenuPrivate::setParentMenu(QQuickMenu*) () at /usr/lib/libQt5QuickTemplates2.so.5
#9  0x00007f8d24d7ca32 in QQuickMenuPrivate::removeItem(int, QQuickItem*) () at /usr/lib/libQt5QuickTemplates2.so.5
#10 0x00007f8d2e899347 in QQuickItemPrivate::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () at /usr/lib/libQt5Quick.so.5
Comment 2 fauno077 2018-10-13 18:24:45 UTC 
Comment on attachment 115632 [details]
New crash information added by DrKonqi

>Application: plasma-discover (5.14.0)
>
>Qt Version: 5.11.2
>Frameworks Version: 5.50.0
>Operating System: Linux 4.18.12-zen1-1-zen x86_64
>Distribution (Platform): Archlinux Packages
>
>-- Information about the crash:
>- What I was doing when the application crashed:
>
>Open Discover, click Applications in the side menu. Sometimes crashes at first click, sometimes the second or third click, no much later.
>
>The crash can be reproduced every time.
>
>-- Backtrace:
>Application: Discover (plasma-discover), signal: Segmentation fault
>Using host libthread_db library "/usr/lib/libthread_db.so.1".
>[Current thread is 1 (Thread 0x7f8d27c1a800 (LWP 12796))]
>
>Thread 21 (Thread 0x7f8c927fc700 (LWP 12842)):
>#0  0x00007f8d2ca9640d in syscall () at /usr/lib/libc.so.6
>#1  0x00007f8d2b283f61 in g_cond_wait_until () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b301cb3 in  () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2b301eb3 in g_async_queue_timeout_pop () at /usr/lib/libglib-2.0.so.0
>#4  0x00007f8d2b2a5c7a in  () at /usr/lib/libglib-2.0.so.0
>#5  0x00007f8d2b29e3eb in  () at /usr/lib/libglib-2.0.so.0
>#6  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#7  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 20 (Thread 0x7f8cc9d68700 (LWP 12835)):
>#0  0x00007f8d2cdabbaf in QMutex::unlock() () at /usr/lib/libQt5Core.so.5
>#1  0x00007f8d2cfb9f04 in  () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2b2d47aa in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2b2d4e06 in  () at /usr/lib/libglib-2.0.so.0
>#4  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#5  0x00007f8d2cfb9fe4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#6  0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#7  0x00007f8d2cdaeeb9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
>#8  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#9  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#10 0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 19 (Thread 0x7f8cd0ff9700 (LWP 12830)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 18 (Thread 0x7f8cd1ffb700 (LWP 12828)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 17 (Thread 0x7f8ccbfff700 (LWP 12826)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 16 (Thread 0x7f8cd37fe700 (LWP 12824)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 15 (Thread 0x7f8cf4bf3700 (LWP 12822)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 14 (Thread 0x7f8cf53f4700 (LWP 12821)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 13 (Thread 0x7f8cf63f6700 (LWP 12819)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 12 (Thread 0x7f8cf77fe700 (LWP 12809)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 11 (Thread 0x7f8cf7fff700 (LWP 12808)):
>#0  0x00007f8d2ca90bb1 in poll () at /usr/lib/libc.so.6
>#1  0x00007f8d2b2d4ee0 in  () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2cfb9fe4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#5  0x00007f8d2cdaeeb9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
>#6  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#7  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#8  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 10 (Thread 0x7f8d089aa700 (LWP 12807)):
>#0  0x00007f8d2ca8c734 in read () at /usr/lib/libc.so.6
>#1  0x00007f8d2b283781 in  () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b2d3a50 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2b2d4e86 in  () at /usr/lib/libglib-2.0.so.0
>#4  0x00007f8d2b2d5f62 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
>#5  0x00007f8d1c08cc28 in  () at /usr/lib/libgio-2.0.so.0
>#6  0x00007f8d2b29e3eb in  () at /usr/lib/libglib-2.0.so.0
>#7  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#8  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 9 (Thread 0x7f8d091ab700 (LWP 12806)):
>#0  0x00007f8d2ca8c734 in read () at /usr/lib/libc.so.6
>#1  0x00007f8d2b283781 in  () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b2d3a50 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2b2d4e86 in  () at /usr/lib/libglib-2.0.so.0
>#4  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#5  0x00007f8d2b2d5022 in  () at /usr/lib/libglib-2.0.so.0
>#6  0x00007f8d2b29e3eb in  () at /usr/lib/libglib-2.0.so.0
>#7  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#8  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 8 (Thread 0x7f8d09a4b700 (LWP 12805)):
>#0  0x00007f8d2bd5eef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d2cdb95fd in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2cdb1024 in  () at /usr/lib/libQt5Core.so.5
>#3  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#5  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 7 (Thread 0x7f8d0a2ab700 (LWP 12804)):
>#0  0x00007f8d2cfb87e8 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
>#1  0x00007f8d2cfb9d4f in  () at /usr/lib/libQt5Core.so.5
>#2  0x00007f8d2b2d47aa in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2b2d4e06 in  () at /usr/lib/libglib-2.0.so.0
>#4  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#5  0x00007f8d2cfb9fe4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#6  0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#7  0x00007f8d2cdaeeb9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
>#8  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#9  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#10 0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 6 (Thread 0x7f8d163c3700 (LWP 12803)):
>#0  0x00007f8d2ca90bb1 in poll () at /usr/lib/libc.so.6
>#1  0x00007f8d2b2d4ee0 in  () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2cfb9fe4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#5  0x00007f8d2cdaeeb9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
>#6  0x00007f8d2e7d55bb in  () at /usr/lib/libQt5Quick.so.5
>#7  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#8  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#9  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 5 (Thread 0x7f8d175d4700 (LWP 12801)):
>#0  0x00007f8d2bd5eafc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
>#1  0x00007f8d1782317c in  () at /usr/lib/dri/i965_dri.so
>#2  0x00007f8d17822eb8 in  () at /usr/lib/dri/i965_dri.so
>#3  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#4  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 4 (Thread 0x7f8d1e591700 (LWP 12800)):
>#0  0x00007f8d2ca8c734 in read () at /usr/lib/libc.so.6
>#1  0x00007f8d2b283781 in  () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b2d3a50 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2b2d4e86 in  () at /usr/lib/libglib-2.0.so.0
>#4  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#5  0x00007f8d2cfb9fe4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#6  0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#7  0x00007f8d2cdaeeb9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
>#8  0x00007f8d2d543859 in  () at /usr/lib/libQt5Qml.so.5
>#9  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#10 0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#11 0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 3 (Thread 0x7f8d1f7a2700 (LWP 12799)):
>#0  0x00007f8d2b283414 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
>#1  0x00007f8d2b2d4d7e in  () at /usr/lib/libglib-2.0.so.0
>#2  0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#3  0x00007f8d2cfb9fe4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#4  0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#5  0x00007f8d2cdaeeb9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
>#6  0x00007f8d2e29eba6 in  () at /usr/lib/libQt5DBus.so.5
>#7  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#8  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#9  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 2 (Thread 0x7f8d25d11700 (LWP 12798)):
>#0  0x00007f8d2ca90bb1 in poll () at /usr/lib/libc.so.6
>#1  0x00007f8d2b24a630 in  () at /usr/lib/libxcb.so.1
>#2  0x00007f8d2b24c2db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
>#3  0x00007f8d274a8c5a in  () at /usr/lib/libQt5XcbQpa.so.5
>#4  0x00007f8d2cdb8f65 in  () at /usr/lib/libQt5Core.so.5
>#5  0x00007f8d2bd58a9d in start_thread () at /usr/lib/libpthread.so.0
>#6  0x00007f8d2ca9ba43 in clone () at /usr/lib/libc.so.6
>
>Thread 1 (Thread 0x7f8d27c1a800 (LWP 12796)):
>[KCrash Handler]
>#6  0x00007f8d2cf93016 in  () at /usr/lib/libQt5Core.so.5
>#7  0x00007f8d2cf93538 in QObject::disconnectImpl(QObject const*, void**, QObject const*, void**, QMetaObject const*) () at /usr/lib/libQt5Core.so.5
>#8  0x00007f8d24d7b26d in QQuickMenuPrivate::setParentMenu(QQuickMenu*) () at /usr/lib/libQt5QuickTemplates2.so.5
>#9  0x00007f8d24d7ca32 in QQuickMenuPrivate::removeItem(int, QQuickItem*) () at /usr/lib/libQt5QuickTemplates2.so.5
>#10 0x00007f8d2e899347 in QQuickItemPrivate::itemChange(QQuickItem::ItemChange, QQuickItem::ItemChangeData const&) () at /usr/lib/libQt5Quick.so.5
>#11 0x00007f8d2e89f0d6 in QQuickItem::setParentItem(QQuickItem*) () at /usr/lib/libQt5Quick.so.5
>#12 0x00007f8d2e8a04cd in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
>#13 0x00007f8d2e8a07ba in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
>#14 0x00007f8d2cf8e9bb in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
>#15 0x00007f8d2cf97955 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
>#16 0x00007f8d2e8a059c in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
>#17 0x00007f8d2e8bf5a7 in  () at /usr/lib/libQt5Quick.so.5
>#18 0x00007f8d2cf8e9bb in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
>#19 0x00007f8d2cf97955 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
>#20 0x00007f8d1ceb994f in  () at /usr/lib/qt/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so
>#21 0x00007f8d2cf8e9bb in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
>#22 0x00007f8d2cf97955 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
>#23 0x00007f8d2e8a059c in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
>#24 0x00007f8d2e8bf7f7 in  () at /usr/lib/libQt5Quick.so.5
>#25 0x00007f8d2cf8e9bb in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
>#26 0x00007f8d2cf97955 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
>#27 0x00007f8d2e8a059c in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
>#28 0x00007f8d2e8bee07 in  () at /usr/lib/libQt5Quick.so.5
>#29 0x00007f8d2cf91371 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
>#30 0x00007f8d2e89dc4c in QQuickItem::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
>#31 0x00007f8d2dd7ce14 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
>#32 0x00007f8d2dd846e1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
>#33 0x00007f8d2cf66c39 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
>#34 0x00007f8d2cf69ccc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
>#35 0x00007f8d2cfba9d4 in  () at /usr/lib/libQt5Core.so.5
>#36 0x00007f8d2b2d33cf in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
>#37 0x00007f8d2b2d4f89 in  () at /usr/lib/libglib-2.0.so.0
>#38 0x00007f8d2b2d4fce in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
>#39 0x00007f8d2cfb9fc9 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#40 0x00007f8d2753ee12 in  () at /usr/lib/libQt5XcbQpa.so.5
>#41 0x00007f8d2cf658cc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
>#42 0x00007f8d2cf6dbc6 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
>#43 0x0000559bd0903616 in  ()
>#44 0x00007f8d2c9c4223 in __libc_start_main () at /usr/lib/libc.so.6
>#45 0x0000559bd0903bde in _start ()
>[Inferior 1 (process 12796) detached]
>
>Reported using DrKonqi
Comment 3 Nate Graham 2018-10-13 19:37:50 UTC 

*** This bug has been marked as a duplicate of bug 399559 ***