Application: plasma-discover (5.10.2)

Qt Version: 5.7.1
Frameworks Version: 5.35.0
Operating System: Linux 4.8.0-54-generic x86_64
Distribution: KDE neon User Edition 5.10

-- Information about the crash:
- What I was doing when the application crashed:
I just tried to install "samba" package via Discover. When I enter "samba" it just hangs. This time it crashed.

-- 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 0x7f62592c78c0 (LWP 2085))]

Thread 8 (Thread 0x7f6220ad6700 (LWP 2097)):
#0  0x00007f62555e470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62509b938c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f625620d75b in QEventDispatcherGlib::processEvents (this=0x7f62140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7f6220ad5d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f6255fe7f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x442eb80) at thread/qthread_unix.cpp:368
#7  0x00007f6252a746ba in start_thread (arg=0x7f6220ad6700) at pthread_create.c:333
#8  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f622884e700 (LWP 2093)):
#0  0x00007f62509fda79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f62509b8929 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62509b92bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f625620d75b in QEventDispatcherGlib::processEvents (this=0x7f621c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7f622884dd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f6255fe7f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x2cd8e60) at thread/qthread_unix.cpp:368
#8  0x00007f6252a746ba in start_thread (arg=0x7f622884e700) at pthread_create.c:333
#9  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f62296fc700 (LWP 2092)):
#0  0x00007f62555e470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62509b938c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f625620d75b in QEventDispatcherGlib::processEvents (this=0x7f62240008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7f62296fbd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f6255fe7f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x2c7ee60) at thread/qthread_unix.cpp:368
#7  0x00007f6252a746ba in start_thread (arg=0x7f62296fc700) at pthread_create.c:333
#8  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f623717f700 (LWP 2091)):
#0  0x00007f62555e470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62509b938c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f625620d75b in QEventDispatcherGlib::processEvents (this=0x7f622c002e00, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7f623717ec90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f6255fe7f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f625893dfc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x2b69250) at thread/qthread_unix.cpp:368
#8  0x00007f6252a746ba in start_thread (arg=0x7f623717f700) at pthread_create.c:333
#9  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f623e307700 (LWP 2089)):
#0  0x00007f62509b9389 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f625620d75b in QEventDispatcherGlib::processEvents (this=0x7f62300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#3  0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7f623e306ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#4  0x00007f6255fe7f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#5  0x00007f625695ebf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x28505f0) at thread/qthread_unix.cpp:368
#7  0x00007f6252a746ba in start_thread (arg=0x7f623e307700) at pthread_create.c:333
#8  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f623f518700 (LWP 2088)):
#0  0x00007f62555e470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f62509b938c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f625620d75b in QEventDispatcherGlib::processEvents (this=0x7f62380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7f623f517cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f6255fe7f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f625940d735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x7f6259481d60) at thread/qthread_unix.cpp:368
#8  0x00007f6252a746ba in start_thread (arg=0x7f623f518700) at pthread_create.c:333
#9  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f6247cb0700 (LWP 2087)):
#0  0x00007f62555e470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f625054ec62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f62505508d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f624a208d79 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f6255fecb48 in QThreadPrivate::start (arg=0x27a8fa0) at thread/qthread_unix.cpp:368
#5  0x00007f6252a746ba in start_thread (arg=0x7f6247cb0700) at pthread_create.c:333
#6  0x00007f62555f03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f62592c78c0 (LWP 2085)):
[KCrash Handler]
#6  0x00007f62563fc610 in typeinfo for QObject () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6229b4ae4e in KNSCore::Engine::doRequest (this=0x2ce71f0) at /workspace/build/src/core/engine.cpp:439
#8  0x00007f6229b4b13b in KNSCore::Engine::requestData (this=<optimized out>, page=page@entry=0, pageSize=pageSize@entry=100) at /workspace/build/src/core/engine.cpp:433
#9  0x00007f6229da4c2a in KNSBackend::<lambda()>::operator() (__closure=0x40afc60) at /workspace/build/libdiscover/backends/KNSBackend/KNSBackend.cpp:327
#10 QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, KNSBackend::searchStream(const QString&)::<lambda()> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:135
#11 QtPrivate::Functor<KNSBackend::searchStream(const QString&)::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:192
#12 QtPrivate::QFunctorSlotObject<KNSBackend::searchStream(const QString&)::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x40afc50, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject_impl.h:169
#13 0x00007f62561e5d99 in QObject::event (this=0x59eee40, e=<optimized out>) at kernel/qobject.cpp:1263
#14 0x00007f625711cecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x59eee40, e=0x2ce3420) at kernel/qapplication.cpp:3799
#15 0x00007f62571248c6 in QApplication::notify (this=0x7fffc7afa6a0, receiver=0x59eee40, e=0x2ce3420) at kernel/qapplication.cpp:3556
#16 0x00007f62561ba0c8 in QCoreApplication::notifyInternal2 (receiver=0x59eee40, event=event@entry=0x2ce3420) at kernel/qcoreapplication.cpp:988
#17 0x00007f62561bc78b in QCoreApplication::sendEvent (event=0x2ce3420, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x278e4f0) at kernel/qcoreapplication.cpp:1649
#19 0x00007f62561bcbf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#20 0x00007f625620d333 in postEventSourceDispatch (s=0x27d3280) at kernel/qeventdispatcher_glib.cpp:276
#21 0x00007f62509b9197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f62509b93f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f62509b949c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f625620d73f in QEventDispatcherGlib::processEvents (this=0x27db7a0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#25 0x00007f62561b80ba in QEventLoop::exec (this=this@entry=0x7fffc7afa5c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#26 0x00007f62561c06cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#27 0x000000000040d4f7 in main (argc=1, argv=<optimized out>) at /workspace/build/discover/main.cpp:151

Possible duplicates by query: bug 381075, bug 380813.

Reported using DrKonqi