Bug 395007

Summary: Discover crashes loading icon theme Papirus
Product: [Applications] Discover Reporter: Clinton <clintonthegeek>
Component: discoverAssignee: Aleix Pol <aleixpol>
Status: RESOLVED NOT A BUG    
Severity: crash CC: epost.kde
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.11.0   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Clinton 2018-06-03 20:21:31 UTC 
Application: plasma-discover (5.11.0)

Qt Version: 5.10.0
Frameworks Version: 5.46.0
Operating System: Linux 4.4.0-127-generic x86_64
Distribution: KDE neon User Edition 5.12

-- Information about the crash:
- What I was doing when the application crashed: After loading Discover I searched for "Papirus" and selected the desired result from the results(https://store.kde.org/p/1166289/).

I already have the icon theme installed, as the button reads "Remove", which is appropriate although I think I installed it from the KHotNewStuff button in System Settings panel, not from within Discover.

Once the details for Papirus (description, screenshots, comments etc.) are fully loaded Discover crashes.

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 0x7f4374db28c0 (LWP 25891))]

Thread 19 (Thread 0x7f4338cd4700 (LWP 25940)):
#0  0x00007f437021127d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f436afae6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6ae74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f436af6b330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f43240034a0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f4338cd3d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#8  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x7f433400e530) at thread/qthread_unix.cpp:376
#9  0x00007f436d0636ba in start_thread (arg=0x7f4338cd4700) at pthread_create.c:333
#10 0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f431623d700 (LWP 25934)):
#0  0x00007f436af6a871 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f436af6b2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f42f40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f431623cd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x6264500) at thread/qthread_unix.cpp:376
#7  0x00007f436d0636ba in start_thread (arg=0x7f431623d700) at pthread_create.c:333
#8  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f4317fff700 (LWP 25915)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f4317fff700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f432898f700 (LWP 25913)):
#0  0x00007f436af6ada8 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f436af6b330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f43100008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f432898ed00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x432fb70) at thread/qthread_unix.cpp:376
#7  0x00007f436d0636ba in start_thread (arg=0x7f432898f700) at pthread_create.c:333
#8  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f4329190700 (LWP 25911)):
#0  0x00007f437021574d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f436af6b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f432ab689d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f436af91bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f436d0636ba in start_thread (arg=0x7f4329190700) at pthread_create.c:333
#6  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f4329991700 (LWP 25910)):
#0  0x00007f437021127d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f436afae6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6ae74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f436af6b330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f436af6b4d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f436af91bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f436d0636ba in start_thread (arg=0x7f4329991700) at pthread_create.c:333
#8  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f43394d5700 (LWP 25907)):
#0  0x00007f436afafa75 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f436af6ac3e in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f43300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f43394d4d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#7  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x25e6540) at thread/qthread_unix.cpp:376
#8  0x00007f436d0636ba in start_thread (arg=0x7f43394d5700) at pthread_create.c:333
#9  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f433b6d4700 (LWP 25906)):
#0  0x00007f437021574d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f436af6b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f432c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f433b6d3d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x25f44c0) at thread/qthread_unix.cpp:376
#7  0x00007f436d0636ba in start_thread (arg=0x7f433b6d4700) at pthread_create.c:333
#8  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f433f4fa700 (LWP 25904)):
#0  0x00007f437021574d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f436af6b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f43340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f433f4f9c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007f43740d61c6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x2471e40) at thread/qthread_unix.cpp:376
#8  0x00007f436d0636ba in start_thread (arg=0x7f433f4fa700) at pthread_create.c:333
#9  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f433fcfb700 (LWP 25902)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f433fcfb700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f43404fc700 (LWP 25901)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f43404fc700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f4340cfd700 (LWP 25900)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f4340cfd700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f43414fe700 (LWP 25899)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f43414fe700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4341cff700 (LWP 25898)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f4341cff700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4342738700 (LWP 25897)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f4342738700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4343560700 (LWP 25896)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f43474d248b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f43474d2397 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f436d0636ba in start_thread (arg=0x7f4343560700) at pthread_create.c:333
#4  0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f434ffff700 (LWP 25895)):
#0  0x00007f436afafa94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f436af6adb9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f436af6b330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f43480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f434fffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#7  0x00007f43717f3a35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x21ca6c0) at thread/qthread_unix.cpp:376
#9  0x00007f436d0636ba in start_thread (arg=0x7f434ffff700) at pthread_create.c:333
#10 0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4355287700 (LWP 25894)):
#0  0x00007ffc0dfeda19 in clock_gettime ()
#1  0x00007f437022f876 in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7f4355286a30) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f4370e50ee1 in qt_clock_gettime (ts=0x7f4355286a30, clock=<optimized out>) at kernel/qelapsedtimer_unix.cpp:111
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f4370e4f6d9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f4350002ed0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f4370e4fc45 in QTimerInfoList::timerWait (this=0x7f4350002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f4370e5134e in timerSourcePrepareHelper (timeout=0x7f4355286b04, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f4355286b04) at kernel/qeventdispatcher_glib.cpp:165
#9  0x00007f436af6a91d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f436af6b2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f4370e515db in QEventDispatcherGlib::processEvents (this=0x7f43500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7f4355286cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#14 0x00007f4370c18554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#15 0x00007f4372fc72c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#16 0x00007f4370c1d6eb in QThreadPrivate::start (arg=0x7f437323bd60) at thread/qthread_unix.cpp:376
#17 0x00007f436d0636ba in start_thread (arg=0x7f4355287700) at pthread_create.c:333
#18 0x00007f437022141d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4374db28c0 (LWP 25891)):
[KCrash Handler]
#6  0x00007f4370e04007 in QMetaObject::cast (this=0x7f4373fa7480 <AbstractResource::staticMetaObject>, obj=0x60d90c0) at kernel/qmetaobject.cpp:366
#7  0x00007f433ab69b47 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/kns-backend.so
#8  0x00007f4370e277c6 in QtPrivate::QSlotObjectBase::call (a=0x7ffc0df51230, r=0x2728cb0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#9  QMetaObject::activate (sender=sender@entry=0x85520e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc0df51230) at kernel/qobject.cpp:3749
#10 0x00007f4370e27da7 in QMetaObject::activate (sender=sender@entry=0x85520e0, m=m@entry=0x7f433a8dc9c0 <Attica::BaseJob::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc0df51230) at kernel/qobject.cpp:3628
#11 0x00007f433a6c152f in Attica::BaseJob::finished (this=this@entry=0x85520e0, _t1=_t1@entry=0x85520e0) at /workspace/build/obj-x86_64-linux-gnu/src/moc_atticabasejob.cpp:168
#12 0x00007f433a66bbdb in Attica::BaseJob::dataFinished (this=0x85520e0) at /workspace/build/src/atticabasejob.cpp:126
#13 0x00007f433a6c1815 in Attica::BaseJob::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/moc_atticabasejob.cpp:100
#14 0x00007f4370e27499 in QMetaObject::activate (sender=sender@entry=0x87b0580, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3766
#15 0x00007f4370e27da7 in QMetaObject::activate (sender=sender@entry=0x87b0580, m=m@entry=0x7f436f1e5da0 <QNetworkReply::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#16 0x00007f436ef8f663 in QNetworkReply::finished (this=this@entry=0x87b0580) at .moc/moc_qnetworkreply.cpp:380
#17 0x00007f436eec8e57 in QNetworkReplyHttpImplPrivate::finished (this=0x8556440) at access/qnetworkreplyhttpimpl.cpp:2231
#18 0x00007f436eec9045 in QNetworkReplyHttpImplPrivate::replyFinished (this=<optimized out>) at access/qnetworkreplyhttpimpl.cpp:1114
#19 0x00007f436ef904a9 in QNetworkReplyHttpImpl::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qnetworkreplyhttpimpl_p.cpp:260
#20 0x00007f4370e284d9 in QObject::event (this=0x87b0580, e=<optimized out>) at kernel/qobject.cpp:1246
#21 0x00007f43723ffacc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x87b0580, e=0x7f4330071550) at kernel/qapplication.cpp:3732
#22 0x00007f4372407417 in QApplication::notify (this=0x7ffc0df51bf0, receiver=0x87b0580, e=0x7f4330071550) at kernel/qapplication.cpp:3491
#23 0x00007f4370dfa3d8 in QCoreApplication::notifyInternal2 (receiver=0x87b0580, event=event@entry=0x7f4330071550) at kernel/qcoreapplication.cpp:1044
#24 0x00007f4370dfcfdb in QCoreApplication::sendEvent (event=0x7f4330071550, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1d54180) at kernel/qcoreapplication.cpp:1719
#26 0x00007f4370dfd448 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1573
#27 0x00007f4370e51fb3 in postEventSourceDispatch (s=0x1dac9c0) at kernel/qeventdispatcher_glib.cpp:276
#28 0x00007f436af6b197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f436af6b3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f436af6b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f4370e515bf in QEventDispatcherGlib::processEvents (this=this@entry=0x1daa760, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#32 0x00007f4364228351 in QPAEventDispatcherGlib::processEvents (this=0x1daa760, flags=...) at qeventdispatcher_glib.cpp:69
#33 0x00007f4370df865a in QEventLoop::exec (this=this@entry=0x7ffc0df51b10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#34 0x00007f4370e01864 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1332
#35 0x0000000000411b9e in ?? ()
#36 0x00007f437013a830 in __libc_start_main (main=0x411180, argc=1, argv=0x7ffc0df51db8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc0df51da8) at ../csu/libc-start.c:291
#37 0x0000000000411cb9 in _start ()

Possible duplicates by query: bug 392084.

Reported using DrKonqi
Comment 1 Aleix Pol 2018-06-04 01:49:22 UTC 
How is it possible that you're running 5.11 on neon? please upgrade.
Comment 2 Clinton 2018-06-04 02:17:38 UTC 
(In reply to Aleix Pol from comment #1)
> How is it possible that you're running 5.11 on neon? please upgrade.

Oh! Well, I have been upgrading regularly. I'm on KDE neon 5.12 and all my packages are up to date according to the package manager. I guess I have a problem somewhere; you're saying I'm somehow not up to date?
Comment 3 Øystein Steffensen-Alværvik 2018-06-04 06:58:43 UTC 
(In reply to Clinton from comment #2)
> (In reply to Aleix Pol from comment #1)
> > How is it possible that you're running 5.11 on neon? please upgrade.
> 
> Oh! Well, I have been upgrading regularly. I'm on KDE neon 5.12 and all my
> packages are up to date according to the package manager. I guess I have a
> problem somewhere; you're saying I'm somehow not up to date?

Your Discover version should match your Plasma version, which currently is 5.12.5 on Neon. Somehow your Discover hasn't updated.
Try this solution posted by someone with a similar issue (you'll have to open a terminal):

> 
> Had the same situation, but managed to force it in "aptitude":
> found the plasma-discover-common package [/^plasma-discover], [enter], and
> on versions I picked the 5.12.5 for installation ([+]) and the aptitude will
> warn about break of dependencies and suggest solutions - examine them [e],
> somewhere about third or fourth solution (next [.]) was to basically keep
> everything as is and "downgrade plasma-discover-**** to 5.12.5" - about four
> other discover packages, so I applied this [!] and since then "apt-get
> upgrade" seems to be happy completely and discover says it's 5.12.5 now.
> 
> There's surely some CLI way to do this same with apt, but I never recall all
> the switches, sorry, I prefer the powerful UI of aptitude (it's just not as
> simple as it may look, takes some time to learn how it works and find out
> some details) ... anyway, still looks miles ahead of discover to me, except
> missing graphics, I can much more easily check all packages, see versions,
> download size, etc. discover is very vague about everything and offers just
> like the main app packages, it's probably perfect for ordinary/new user, but
> I can't seem to get use for it, maybe once when I did need quick overview of
> current media players available, at that point discover design works quite
> well.