Bug 356966

Application: kdeinit5 (15.12.0)

Qt Version: 5.6.0
Operating System: Linux 4.4.0-0.rc5.git3.1.fc24.x86_64 x86_64
Distribution (Platform): Fedora RPMs

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

File->Save Output As

This is reproduced using the Fedora rawhide packages:

qt5-qtbase-5.6.0-0.16.fc24.x86_64
konsole5-15.12.0-1.fc24.x86_64

This looks like a side effect of the changes made for QTBUG-42985. Similar crashes have been seen when these were backported on top of QT 5.5 (bug 356583) but I wanted to verify they are also present in QT 5.6 beta.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Konsole (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f94ac72e8c0 (LWP 2413))]

Thread 7 (Thread 0x7f948ede7700 (LWP 2414)):
#0  0x00007f94a9dc290d in poll () from /lib64/libc.so.6
#1  0x00007f94a82333dc in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#2  0x00007f94a82334ec in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f94aac05acb in QEventDispatcherGlib::processEvents (this=0x7f94880008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f94aabae50a in QEventLoop::exec (this=this@entry=0x7f948ede6cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f94aa9da744 in QThread::exec (this=this@entry=0x7f94ac859040 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:503
#6  0x00007f94ac7e7225 in QDBusConnectionManager::run (this=0x7f94ac859040 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:152
#7  0x00007f94aa9df6b8 in QThreadPrivate::start (arg=0x7f94ac859040 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:340
#8  0x00007f94a94086da in start_thread () from /lib64/libpthread.so.0
#9  0x00007f94a9dce48d in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f9487fff700 (LWP 2415)):
#0  0x00007f94a9dc290d in poll () from /lib64/libc.so.6
#1  0x00007f94a8f99272 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f94a8f9aee7 in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f948dc53f09 in QXcbEventReader::run (this=0x5595103aced0) at qxcbconnection.cpp:1288
#4  0x00007f94aa9df6b8 in QThreadPrivate::start (arg=0x5595103aced0) at thread/qthread_unix.cpp:340
#5  0x00007f94a94086da in start_thread () from /lib64/libpthread.so.0
#6  0x00007f94a9dce48d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f947db45700 (LWP 2416)):
#0  0x00007f94a940e340 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f9485e72fc3 in thread_function () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f9485e72e27 in impl_thrd_routine () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f94a94086da in start_thread () from /lib64/libpthread.so.0
#4  0x00007f94a9dce48d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f947d344700 (LWP 2417)):
#0  0x00007f94a940e340 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f9485e72fc3 in thread_function () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f9485e72e27 in impl_thrd_routine () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f94a94086da in start_thread () from /lib64/libpthread.so.0
#4  0x00007f94a9dce48d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f947cb43700 (LWP 2418)):
#0  0x00007f94a940e340 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f9485e72fc3 in thread_function () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f9485e72e27 in impl_thrd_routine () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f94a94086da in start_thread () from /lib64/libpthread.so.0
#4  0x00007f94a9dce48d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f947c342700 (LWP 2419)):
#0  0x00007f94a940e340 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f9485e72fc3 in thread_function () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f9485e72e27 in impl_thrd_routine () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f94a94086da in start_thread () from /lib64/libpthread.so.0
#4  0x00007f94a9dce48d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f94ac72e8c0 (LWP 2413)):
[KCrash Handler]
#5  0x00007f948dc6b408 in QXcbWindow::setParent (this=0x5595108d37c0, parent=0x0) at qxcbwindow.cpp:1426
#6  0x00007f94aaf063d3 in QWindow::setParent (this=0x559510a4dad0, parent=parent@entry=0x559510906ff0) at kernel/qwindow.cpp:621
#7  0x00007f94ab51a085 in QWidgetPrivate::setParent_sys (this=this@entry=0x559510712c00, newparent=newparent@entry=0x5595109fd1b0, f=...) at kernel/qwidget.cpp:10606
#8  0x00007f94ab5257d5 in QWidget::setParent (this=this@entry=0x559510687800, parent=parent@entry=0x5595109fd1b0, f=...) at kernel/qwidget.cpp:10461
#9  0x00007f94ab52685c in QWidget::setParent (this=this@entry=0x559510687800, parent=parent@entry=0x5595109fd1b0) at kernel/qwidget.cpp:10397
#10 0x00007f94ab60893c in QDialogButtonBox::addButton (this=0x5595109fd1b0, button=0x559510687800, role=QDialogButtonBox::AcceptRole) at widgets/qdialogbuttonbox.cpp:761
#11 0x00007f94875ea309 in KDEPlatformFileDialog::KDEPlatformFileDialog() () from /usr/lib64/qt5/plugins/platformthemes/KDEPlatformTheme.so
#12 0x00007f94875ea5e2 in KDEPlatformFileDialogHelper::KDEPlatformFileDialogHelper() () from /usr/lib64/qt5/plugins/platformthemes/KDEPlatformTheme.so
#13 0x00007f94875de42a in KdePlatformTheme::createPlatformDialogHelper(QPlatformTheme::DialogType) const () from /usr/lib64/qt5/plugins/platformthemes/KDEPlatformTheme.so
#14 0x00007f94ab6d7e05 in QDialogPrivate::platformHelper (this=this@entry=0x559510683390) at dialogs/qdialog.cpp:94
#15 0x00007f94ab6eae48 in QFileDialogPrivate::platformFileDialogHelper (this=0x559510683390) at dialogs/qfiledialog_p.h:112
#16 QFileDialogPrivate::init (this=this@entry=0x559510683390, directory=..., nameFilter=..., caption=...) at dialogs/qfiledialog.cpp:2800
#17 0x00007f94ab6eb07a in QFileDialog::QFileDialog (this=0x559510711a00, parent=0x55951042b280, caption=..., directory=..., filter=...) at dialogs/qfiledialog.cpp:363
#18 0x00007f94907e018b in Konsole::SaveHistoryTask::execute() () from /lib64/libkonsoleprivate.so.15
#19 0x00007f949081f337 in Konsole::SessionController::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libkonsoleprivate.so.15
#20 0x00007f94aabdd020 in QMetaObject::activate (sender=sender@entry=0x5595105fa910, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe46ff16c0) at kernel/qobject.cpp:3730
#21 0x00007f94aabdd8f7 in QMetaObject::activate (sender=sender@entry=0x5595105fa910, m=m@entry=0x7f94ab9d60e0 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe46ff16c0) at kernel/qobject.cpp:3595
#22 0x00007f94ab4d7922 in QAction::triggered (this=this@entry=0x5595105fa910, _t1=false) at .moc/moc_qaction.cpp:365
#23 0x00007f94ab4d9d20 in QAction::activate (this=0x5595105fa910, event=<optimized out>) at kernel/qaction.cpp:1163
#24 0x00007f94ab65b972 in QMenuPrivate::activateCausedStack (this=this@entry=0x5595104ed430, causedStack=..., action=action@entry=0x5595105fa910, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1128
#25 0x00007f94ab661ae6 in QMenuPrivate::activateAction (this=this@entry=0x5595104ed430, action=action@entry=0x5595105fa910, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1205
#26 0x00007f94ab665c09 in QMenu::mouseReleaseEvent (this=<optimized out>, e=0x7ffe46ff1cf0) at widgets/qmenu.cpp:2628
#27 0x00007f94ab524978 in QWidget::event (this=this@entry=0x5595104e78c0, event=event@entry=0x7ffe46ff1cf0) at kernel/qwidget.cpp:9104
#28 0x00007f94ab66669b in QMenu::event (this=0x5595104e78c0, e=0x7ffe46ff1cf0) at widgets/qmenu.cpp:2742
#29 0x00007f94ab4e05ec in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5595104e78c0, e=0x7ffe46ff1cf0) at kernel/qapplication.cpp:3712
#30 0x00007f94ab4e5fb1 in QApplication::notify (this=<optimized out>, receiver=0x5595104e78c0, e=0x7ffe46ff1cf0) at kernel/qapplication.cpp:3270
#31 0x00007f94aabb0948 in QCoreApplication::notifyInternal2 (receiver=0x5595104e78c0, event=0x7ffe46ff1cf0) at kernel/qcoreapplication.cpp:1013
#32 0x00007f94ab4e4d85 in QApplicationPrivate::sendMouseEvent (receiver=0x5595104e78c0, event=0x7ffe46ff1cf0, alienWidget=0x0, nativeWidget=0x5595104e78c0, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true) at ../../src/corelib/kernel/qcoreapplication.h:227
#33 0x00007f94ab53e855 in QWidgetWindow::handleMouseEvent (this=this@entry=0x5595105edde0, event=event@entry=0x7ffe46ff2100) at kernel/qwidgetwindow.cpp:452
#34 0x00007f94ab540a13 in QWidgetWindow::event (this=0x5595105edde0, event=0x7ffe46ff2100) at kernel/qwidgetwindow.cpp:210
#35 0x00007f94ab4e05ec in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5595105edde0, e=0x7ffe46ff2100) at kernel/qapplication.cpp:3712
#36 0x00007f94ab4e5836 in QApplication::notify (this=0x7ffe46ff25d0, receiver=0x5595105edde0, e=0x7ffe46ff2100) at kernel/qapplication.cpp:3493
#37 0x00007f94aabb0948 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x5595105edde0, event=event@entry=0x7ffe46ff2100) at kernel/qcoreapplication.cpp:1013
#38 0x00007f94aaefd920 in QCoreApplication::sendSpontaneousEvent (event=0x7ffe46ff2100, receiver=0x5595105edde0) at ../../src/corelib/kernel/qcoreapplication.h:230
#39 QGuiApplicationPrivate::processMouseEvent (e=0x55951071eec0) at kernel/qguiapplication.cpp:1843
#40 0x00007f94aaeff4b5 in QGuiApplicationPrivate::processWindowSystemEvent (e=<optimized out>) at kernel/qguiapplication.cpp:1627
#41 0x00007f94aaedc7ab in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:636
#42 0x00007f948dc87ec0 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#43 0x00007f94a82330aa in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#44 0x00007f94a8233440 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#45 0x00007f94a82334ec in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#46 0x00007f94aac05aaf in QEventDispatcherGlib::processEvents (this=0x5595103d4800, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#47 0x00007f94aabae50a in QEventLoop::exec (this=this@entry=0x7ffe46ff24a0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#48 0x00007f94aabb6d4c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1283
#49 0x00007f9490a9038e in kdemain () from /lib64/libkdeinit5_konsole.so
#50 0x00005595100e38fc in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()
#51 0x00005595100e4fce in handle_launcher_request(int, char const*) [clone .isra.23] ()
#52 0x00005595100e553b in handle_requests(int) ()
#53 0x00005595100e029b in main ()

Possible duplicates by query: bug 356867, bug 356718.

Reported using DrKonqi