https://bugs.kde.org/show_bug.cgi?id=405370

            Bug ID: 405370
           Summary: gwenview crashed immediately when I tried to start it
                    via the apps launcher
           Product: gwenview
           Version: 18.12.3
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: gwenview-bugs-n...@kde.org
          Reporter: bugsefor...@gmx.com
  Target Milestone: ---

I tried to open gwenview via the apps launcher (kickoff) and plasma immediately
shown a crash notification. So I opened gwenview without any problem by
double-clicking a picture in Dolphin. I was able to reproduce the crash a few
times, now gwenview is working as expected.

Operating System: Arch Linux 
KDE Plasma Version: 5.15.2
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.1


Thread 3 (Thread 0x7f63af624700 (LWP 21246)):
#0  0x00007f63b7d98c21 in poll () at /usr/lib/libc.so.6
#1  0x00007f63b3ce5690 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f63b3ce577e in g_main_context_iteration () at
/usr/lib/libglib-2.0.so.0
#3  0x00007f63b82cdd04 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f63a8000b20, flags=...)
    at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f63b8276b2c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f63af623cb0, flags=..., flags@entry=...)
    at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007f63b80ba569 in QThread::exec() (this=this@entry=0x7f63b7a6f080
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>)
    at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007f63b79f3ba6 in QDBusConnectionManager::run() (this=0x7f63b7a6f080
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>)
    at qdbusconnection.cpp:178
#7  0x00007f63b80bb96c in QThreadPrivate::start(void*) (arg=0x7f63b7a6f080
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>)
    at thread/qthread_unix.cpp:361
#8  0x00007f63b6127a9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f63b7da3b23 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f63a6521700 (LWP 21248)):
#0  0x00007f63b612dafc in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1  0x00007f63a6b2ec94 in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f63a6b2e9b8 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007f63b6127a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f63b7da3b23 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f63b09a4280 (LWP 21245)):
#0  0x00007f63b7cdfd7f in raise () at /usr/lib/libc.so.6
#1  0x00007f63b6513bcf in KCrash::defaultCrashHandler(int) () at
/usr/lib/libKF5Crash.so.5
#2  0x00007f63b7cdfe00 in <signal handler called> () at /usr/lib/libc.so.6
#3  0x00007f63b131ce50 in  () at /usr/lib/liblmdb.so
#4  0x00007f63b13208e8 in  () at /usr/lib/liblmdb.so
#5  0x00007f63b131ee69 in mdb_cursor_get () at /usr/lib/liblmdb.so
#6  0x00007f63b337fdff in Baloo::PostingDB::fetchTermsStartingWith(QByteArray
const&) () at /usr/lib/libKF5BalooEngine.so.5
#7  0x00007f63b33862d2 in Baloo::Transaction::fetchTermsStartingWith(QByteArray
const&) const () at /usr/lib/libKF5BalooEngine.so.5
#8  0x00007f63b6b3bb79 in Baloo::TagListJob::start() () at
/usr/lib/libKF5Baloo.so.5
#9  0x00007f63b85d8cf1 in KJob::exec() () at /usr/lib/libKF5CoreAddons.so.5
#10 0x00007f63b9c71111 in Gwenview::BalooSemanticInfoBackend::refreshAllTags()
() at /usr/lib/libgwenviewlib.so.5
#11 0x00007f63b9c71053 in Gwenview::BalooSemanticInfoBackend::allTags() const
() at /usr/lib/libgwenviewlib.so.5
#12 0x00007f63b9c6d614 in Gwenview::TagModel::createAllTagsModel(QObject*,
Gwenview::AbstractSemanticInfoBackEnd*) () at /usr/lib/libgwenviewlib.so.5
#13 0x0000563291ca219e in  ()
#14 0x00007f63b8e8eb68 in QWidget::event(QEvent*)
(this=this@entry=0x563292068f50, event=event@entry=0x7fff3ec4a1f0) at
kernel/qwidget.cpp:8935
#15 0x00007f63b8f3636f in QFrame::event(QEvent*) (this=0x563292068f50,
e=0x7fff3ec4a1f0) at widgets/qframe.cpp:550
#16 0x00007f63b8e4de24 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=this@entry=0x563291d41750, receiver=receiver@entry=0x563292068f50,
e=e@entry=0x7fff3ec4a1f0) at kernel/qapplication.cpp:3753
#17 0x00007f63b8e556e1 in QApplication::notify(QObject*, QEvent*)
(this=0x7fff3ec4a800, receiver=0x563292068f50, e=0x7fff3ec4a1f0) at
kernel/qapplication.cpp:3500
#18 0x00007f63b8277e99 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x563292068f50, event=0x7fff3ec4a1f0) at
../../include/QtCore/5.12.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:322
#19 0x00007f63b8e8b3e8 in QWidgetPrivate::show_helper() (this=0x56329204a710)
at kernel/qwidget.cpp:8055
#20 0x00007f63b8e8b215 in QWidgetPrivate::show_recursive() (this=<optimized
out>) at kernel/qwidget.cpp:7926
#21 0x00007f63b8e8b34c in QWidgetPrivate::showChildren(bool)
(this=this@entry=0x563291e70900, spontaneous=spontaneous@entry=false) at
../../include/QtCore/../../src/corelib/global/qglobal.h:1038
#22 0x00007f63b8e8b3c2 in QWidgetPrivate::show_helper()
(this=this@entry=0x563291e70900) at kernel/qwidget.cpp:8002
#23 0x00007f63b8e8e6e5 in QWidget::setVisible(bool) (this=0x563291e708c0,
visible=<optimized out>) at kernel/qwidget.cpp:8351
#24 0x00007f63b8e8b361 in QWidgetPrivate::showChildren(bool)
(this=this@entry=0x563291dcb280, spontaneous=spontaneous@entry=false) at
kernel/qwidget.cpp:8434
#25 0x00007f63b8e8b3c2 in QWidgetPrivate::show_helper()
(this=this@entry=0x563291dcb280) at kernel/qwidget.cpp:8002
#26 0x00007f63b8e8e6e5 in QWidget::setVisible(bool) (this=0x563291db0d30,
visible=<optimized out>) at kernel/qwidget.cpp:8351
#27 0x00007f63b8e8b361 in QWidgetPrivate::showChildren(bool)
(this=this@entry=0x563291de0670, spontaneous=spontaneous@entry=false) at
kernel/qwidget.cpp:8434
#28 0x00007f63b8e8b3c2 in QWidgetPrivate::show_helper()
(this=this@entry=0x563291de0670) at kernel/qwidget.cpp:8002
#29 0x00007f63b8e8e6e5 in QWidget::setVisible(bool) (this=0x563291de6300,
visible=<optimized out>) at kernel/qwidget.cpp:8351
#30 0x00007f63b8e8b361 in QWidgetPrivate::showChildren(bool)
(this=this@entry=0x563291ddbf80, spontaneous=spontaneous@entry=false) at
kernel/qwidget.cpp:8434
#31 0x00007f63b8e8b3c2 in QWidgetPrivate::show_helper()
(this=this@entry=0x563291ddbf80) at kernel/qwidget.cpp:8002
#32 0x00007f63b8e8e6e5 in QWidget::setVisible(bool) (this=0x563291dcda00,
visible=<optimized out>) at kernel/qwidget.cpp:8351
#33 0x0000563291c8f81c in  ()
#34 0x0000563291c698e9 in  ()
#35 0x00007f63b7ccc223 in __libc_start_main () at /usr/lib/libc.so.6
#36 0x0000563291c6a0fe in _start ()

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