Application: plasma-discover (5.12.2)

Qt Version: 5.10.0
Frameworks Version: 5.43.0
Operating System: Linux 4.4.0-116-generic x86_64
Distribution: KDE neon User Edition 5.12

-- Information about the crash:
- What I was doing when the application crashed:  Discover crashes when attempting to launch from menu.  Additionally, on attempting update from task bar.

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 0x7f71dca368c0 (LWP 9676))]

Thread 4 (Thread 0x7f71afe09700 (LWP 9680)):
#0  0x00007f71d7e8974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f71d2be538c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f71d2be549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f71d8ac55cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f71d8a6c64a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f71d888c554 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f71dbc821c6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f71d88916eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f71d4cdd6ba in start_thread (arg=0x7f71afe09700) at pthread_create.c:333
#9  0x00007f71d7e9541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f71bb5ef700 (LWP 9679)):
#0  0x00007f71d7e8974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f71d2be538c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f71d2be549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f71d8ac55cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f71d8a6c64a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f71d888c554 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f71d9467a35 in QQmlThreadPrivate::run (this=0x1679fc0) at qml/ftw/qqmlthread.cpp:147
#7  0x00007f71d88916eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f71d4cdd6ba in start_thread (arg=0x7f71bb5ef700) at pthread_create.c:333
#9  0x00007f71d7e9541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f71c08ae700 (LWP 9678)):
#0  0x00007f71d2c29a70 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f71d2be534e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f71d2be549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f71d8ac55cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f71d8a6c64a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f71d888c554 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f71da78d2c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f71d88916eb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f71d4cdd6ba in start_thread (arg=0x7f71c08ae700) at pthread_create.c:333
#9  0x00007f71d7e9541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f71dca368c0 (LWP 9676)):
[KCrash Handler]
#6  0x00007f71dc93a584 in ?? ()
#7  0x00007f71d930588b in QV4::ExecutionContext::simpleCall (this=<optimized out>, scope=..., callData=callData@entry=0x7f71ba5b0328, function=0x18cf0f0) at jsruntime/qv4context.cpp:302
#8  0x00007f71d9447a1f in QQmlJavaScriptExpression::evaluate (this=this@entry=0x18f6f60, callData=0x7f71ba5b0328, isUndefined=isUndefined@entry=0x7ffe00925eff, scope=...) at qml/qqmljavascriptexpression.cpp:223
#9  0x00007f71d9452228 in QQmlNonbindingBinding::doUpdate (this=0x18f6f60, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:207
#10 0x00007f71d944f25b in QQmlBinding::update (this=0x18f6f60, flags=...) at qml/qqmlbinding.cpp:168
#11 0x00007f71d945c091 in QQmlObjectCreator::finalize (this=0x16b5240, interrupt=...) at qml/qqmlobjectcreator.cpp:1225
#12 0x00007f71d93d4d8e in QQmlComponentPrivate::complete (enginePriv=0x166e610, state=0x16e50e0) at qml/qqmlcomponent.cpp:914
#13 0x00007f71d93d4ea7 in QQmlComponentPrivate::completeCreate (this=0x16e5040) at qml/qqmlcomponent.cpp:950
#14 0x00007f71d93d4c7a in QQmlComponent::create (this=0x16e4d00, context=0x16d8680) at qml/qqmlcomponent.cpp:769
#15 0x00007f71d9453ffb in QQmlApplicationEnginePrivate::finishLoad (this=this@entry=0x166e610, c=c@entry=0x16e4d00) at qml/qqmlapplicationengine.cpp:134
#16 0x00007f71d94542ae in QQmlApplicationEnginePrivate::startLoad (this=0x166e610, url=..., data=..., dataFlag=dataFlag@entry=false) at qml/qqmlapplicationengine.cpp:118
#17 0x00007f71d94542ed in QQmlApplicationEngine::load (this=<optimized out>, url=...) at qml/qqmlapplicationengine.cpp:259
#18 0x0000000000416a85 in ?? ()
#19 0x0000000000411baa in ?? ()
#20 0x00007f71d7dae830 in __libc_start_main (main=0x411580, argc=1, argv=0x7ffe00926618, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe00926608) at ../csu/libc-start.c:291
#21 0x00000000004120b9 in _start ()

Possible duplicates by query: bug 388728.

Reported using DrKonqi