Bug 360670

Application: dolphin (15.12.1)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-13-generic x86_64
Distribution: Ubuntu Xenial Xerus (development branch)

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

I was trying to configure Dolphin. When selecting the Menu item Configure Dolhin, It Crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb08751a8c0 (LWP 27501))]

Thread 3 (Thread 0x7fb0847fd700 (LWP 27502)):
#0  0x00007fb098dc69ed in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb08d530c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb08d5328d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb08717d4a9 in QXcbEventReader::run (this=0x1d88ee0) at qxcbconnection.cpp:1253
#4  0x00007fb0939977fe in QThreadPrivate::start (arg=0x1d88ee0) at thread/qthread_unix.cpp:331
#5  0x00007fb09014366a in start_thread (arg=0x7fb0847fd700) at pthread_create.c:333
#6  0x00007fb098dd201d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb0793e2700 (LWP 27503)):
#0  0x00007fb098dc69ed in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb08f5b731c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb08f5b742c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb093bcea6b in QEventDispatcherGlib::processEvents (this=0x7fb0740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb093b75d7a in QEventLoop::exec (this=this@entry=0x7fb0793e1d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb093992854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb0939977fe in QThreadPrivate::start (arg=0x21c0020) at thread/qthread_unix.cpp:331
#7  0x00007fb09014366a in start_thread (arg=0x7fb0793e2700) at pthread_create.c:333
#8  0x00007fb098dd201d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb08751a8c0 (LWP 27501)):
[KCrash Handler]
#6  QBasicAtomicOps<4>::ref<int> (_q_value=@0xffdb5a50ffdb5a60: <error reading variable>) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:181
#7  QBasicAtomicInteger<int>::ref (this=0xffdb5a50ffdb5a60) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:127
#8  QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x25fb710) at tools/qsharedpointer.cpp:1343
#9  0x00007fb0946d88e5 in QWeakPointer<QObject>::QWeakPointer<QObject> (ptr=0x25fb710, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qsharedpointer_impl.h:696
#10 QWeakPointer<QObject>::assign<QObject> (ptr=0x25fb710, this=0x7fb094babb00 <qt_last_mouse_receiver>) at ../../include/QtCore/../../src/corelib/tools/qsharedpointer_impl.h:692
#11 QPointer<QWidget>::operator= (p=0x25fb710, this=0x7fb094babb00 <qt_last_mouse_receiver>) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:67
#12 QWidgetWindow::handleMouseEvent (this=this@entry=0x26e02c0, event=event@entry=0x7ffd1668f2d0) at kernel/qwidgetwindow.cpp:453
#13 0x00007fb0946dab3b in QWidgetWindow::event (this=0x26e02c0, event=0x7ffd1668f2d0) at kernel/qwidgetwindow.cpp:210
#14 0x00007fb09467b05c in QApplicationPrivate::notify_helper (this=this@entry=0x1d6ca10, receiver=receiver@entry=0x26e02c0, e=e@entry=0x7ffd1668f2d0) at kernel/qapplication.cpp:3716
#15 0x00007fb094680516 in QApplication::notify (this=0x7ffd16690690, receiver=0x26e02c0, e=0x7ffd1668f2d0) at kernel/qapplication.cpp:3499
#16 0x00007fb093b785bb in QCoreApplication::notifyInternal (this=0x7ffd16690690, receiver=receiver@entry=0x26e02c0, event=event@entry=0x7ffd1668f2d0) at kernel/qcoreapplication.cpp:965
#17 0x00007fb0940ca521 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd1668f2d0, receiver=0x26e02c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#18 QGuiApplicationPrivate::processMouseEvent (e=0x2636ae0) at kernel/qguiapplication.cpp:1804
#19 0x00007fb0940cc1e5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x2636ae0) at kernel/qguiapplication.cpp:1596
#20 0x00007fb0940aff38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#21 0x00007fb0871aed70 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#22 0x00007fb08f5b7127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fb08f5b7380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fb08f5b742c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fb093bcea4f in QEventDispatcherGlib::processEvents (this=0x1dad950, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#26 0x00007fb093b75d7a in QEventLoop::exec (this=this@entry=0x7ffd1668f650, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#27 0x00007fb0947fade0 in QMenu::exec (this=<optimized out>, p=..., action=action@entry=0x0) at widgets/qmenu.cpp:2307
#28 0x00007fb09483d16e in QToolButtonPrivate::popupTimerDone (this=0x21917f0) at widgets/qtoolbutton.cpp:780
#29 0x00007fb093ba6f9a in QMetaObject::activate (sender=sender@entry=0x2008200, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3713
#30 0x00007fb093ba77a7 in QMetaObject::activate (sender=sender@entry=0x2008200, m=m@entry=0x7fb094b9ca40 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3578
#31 0x00007fb094a151f0 in QAbstractButton::pressed (this=this@entry=0x2008200) at .moc/moc_qabstractbutton.cpp:290
#32 0x00007fb094777f87 in QAbstractButtonPrivate::emitPressed (this=0x21917f0) at widgets/qabstractbutton.cpp:548
#33 0x00007fb0947780e1 in QAbstractButton::mousePressEvent (this=this@entry=0x2008200, e=e@entry=0x7ffd1668fdd0) at widgets/qabstractbutton.cpp:1105
#34 0x00007fb09483df5f in QToolButton::mousePressEvent (this=0x2008200, e=0x7ffd1668fdd0) at widgets/qtoolbutton.cpp:600
#35 0x00007fb0946be3cf in QWidget::event (this=0x2008200, event=0x7ffd1668fdd0) at kernel/qwidget.cpp:8674
#36 0x00007fb09477a3c1 in QAbstractButton::event (this=this@entry=0x2008200, e=e@entry=0x7ffd1668fdd0) at widgets/qabstractbutton.cpp:1089
#37 0x00007fb09483e209 in QToolButton::event (this=0x2008200, event=0x7ffd1668fdd0) at widgets/qtoolbutton.cpp:970
#38 0x00007fb09467b05c in QApplicationPrivate::notify_helper (this=this@entry=0x1d6ca10, receiver=receiver@entry=0x2008200, e=e@entry=0x7ffd1668fdd0) at kernel/qapplication.cpp:3716
#39 0x00007fb094680c19 in QApplication::notify (this=<optimized out>, receiver=0x2008200, e=0x7ffd1668fdd0) at kernel/qapplication.cpp:3276
#40 0x00007fb093b785bb in QCoreApplication::notifyInternal (this=0x7ffd16690690, receiver=receiver@entry=0x2008200, event=event@entry=0x7ffd1668fdd0) at kernel/qcoreapplication.cpp:965
#41 0x00007fb09467fb32 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd1668fdd0, receiver=0x2008200) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#42 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x2008200, event=event@entry=0x7ffd1668fdd0, alienWidget=alienWidget@entry=0x2008200, nativeWidget=0x1e4b8f0, buttonDown=buttonDown@entry=0x7fb094babb20 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2770
#43 0x00007fb0946d857b in QWidgetWindow::handleMouseEvent (this=this@entry=0x2075920, event=event@entry=0x7ffd166901e0) at kernel/qwidgetwindow.cpp:555
#44 0x00007fb0946dab3b in QWidgetWindow::event (this=0x2075920, event=0x7ffd166901e0) at kernel/qwidgetwindow.cpp:210
#45 0x00007fb09467b05c in QApplicationPrivate::notify_helper (this=this@entry=0x1d6ca10, receiver=receiver@entry=0x2075920, e=e@entry=0x7ffd166901e0) at kernel/qapplication.cpp:3716
#46 0x00007fb094680516 in QApplication::notify (this=0x7ffd16690690, receiver=0x2075920, e=0x7ffd166901e0) at kernel/qapplication.cpp:3499
#47 0x00007fb093b785bb in QCoreApplication::notifyInternal (this=0x7ffd16690690, receiver=receiver@entry=0x2075920, event=event@entry=0x7ffd166901e0) at kernel/qcoreapplication.cpp:965
#48 0x00007fb0940ca521 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd166901e0, receiver=0x2075920) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#49 QGuiApplicationPrivate::processMouseEvent (e=0x2612fe0) at kernel/qguiapplication.cpp:1804
#50 0x00007fb0940cc1e5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x2612fe0) at kernel/qguiapplication.cpp:1596
#51 0x00007fb0940aff38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#52 0x00007fb0871aed70 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#53 0x00007fb08f5b7127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007fb08f5b7380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007fb08f5b742c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#56 0x00007fb093bcea4f in QEventDispatcherGlib::processEvents (this=0x1dad950, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#57 0x00007fb093b75d7a in QEventLoop::exec (this=this@entry=0x7ffd16690560, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#58 0x00007fb093b7de1c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#59 0x00007fb0940c1c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#60 0x00007fb094677495 in QApplication::exec () at kernel/qapplication.cpp:2976
#61 0x00007fb0990f2feb in kdemain (argc=1, argv=<optimized out>) at ../../src/main.cpp:150
#62 0x00007fb098ceba00 in __libc_start_main (main=0x400710 <main(int, char**)>, argc=1, argv=0x7ffd16690818, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd16690808) at libc-start.c:289
#63 0x0000000000400749 in _start ()

Possible duplicates by query: bug 355531.

Reported using DrKonqi