Application: kdevelop (5.0.0)
 (Compiled from sources)
Qt Version: 5.6.1
Frameworks Version: 5.25.0
Operating System: Linux 4.7.1+ x86_64
Distribution: "Gentoo Base System release 2.2"

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

I was trying to bring up the settings window via the menu option.

The crash can be reproduced every time.

-- Backtrace:
Application: KDevelop (kdevelop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
84	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7fb2c071c840 (LWP 10080))]

Thread 6 (Thread 0x7fb29b35e700 (LWP 10236)):
#0  g_main_context_iterate (context=context@entry=0x7fb28c001cd0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3847
#1  0x00007fb2d18f30fc in g_main_context_iteration (context=0x7fb28c001cd0, may_block=may_block@entry=1) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3901
#2  0x00007fb2da1cadab in QEventDispatcherGlib::processEvents (this=0x7fb28c001c00, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#3  0x00007fb2da17ad1a in QEventLoop::exec (this=this@entry=0x7fb29b35dd60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fb2d9fd9f74 in QThread::exec (this=this@entry=0x25266e0) at thread/qthread.cpp:500
#5  0x00007fb2cff51d75 in QQmlThreadPrivate::run (this=0x25266e0) at qml/ftw/qqmlthread.cpp:141
#6  0x00007fb2d9fde41c in QThreadPrivate::start (arg=0x25266e0) at thread/qthread_unix.cpp:341
#7  0x00007fb2d38da434 in start_thread (arg=0x7fb29b35e700) at pthread_create.c:334
#8  0x00007fb2d988d29d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb2a7c31700 (LWP 10085)):
#0  pthread_cond_timedwait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007fb2d9fdea68 in QWaitConditionPrivate::wait_relative (time=1000, this=0x1d2f6a0) at thread/qwaitcondition_unix.cpp:126
#2  QWaitConditionPrivate::wait (time=1000, this=0x1d2f6a0) at thread/qwaitcondition_unix.cpp:134
#3  QWaitCondition::wait (this=this@entry=0x1e0e298, mutex=mutex@entry=0x1e0e2a0, time=time@entry=1000) at thread/qwaitcondition_unix.cpp:208
#4  0x00007fb2d797f588 in KDevelop::DUChainPrivate::CleanupThread::run (this=0x1e0e280) at /usr/src/debug/dev-util/kdevplatform-9999/kdevplatform-9999/language/duchain/duchain.cpp:282
#5  0x00007fb2d9fde41c in QThreadPrivate::start (arg=0x1e0e280) at thread/qthread_unix.cpp:341
#6  0x00007fb2d38da434 in start_thread (arg=0x7fb2a7c31700) at pthread_create.c:334
#7  0x00007fb2d988d29d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb2a8830700 (LWP 10084)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb2b479d0f3 in cnd_wait (mtx=0x1f9d0c0, cond=0x1f9d0e8) at /usr/src/debug/media-libs/mesa-12.0.1/mesa-12.0.1/include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0x1f9d0c0) at /usr/src/debug/media-libs/mesa-12.0.1/mesa-12.0.1/src/gallium/auxiliary/os/os_thread.h:259
#3  radeon_drm_cs_emit_ioctl (param=param@entry=0x1f9cc70) at /usr/src/debug/media-libs/mesa-12.0.1/mesa-12.0.1/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c:710
#4  0x00007fb2b479c817 in impl_thrd_routine (p=<optimized out>) at /usr/src/debug/media-libs/mesa-12.0.1/mesa-12.0.1/include/c11/threads_posix.h:87
#5  0x00007fb2d38da434 in start_thread (arg=0x7fb2a8830700) at pthread_create.c:334
#6  0x00007fb2d988d29d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb2bcd1b700 (LWP 10082)):
#0  0x00007fb2d98842dd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2d18f2fec in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fb2b0003020, timeout=<optimized out>, context=0x7fb2b0000990) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:4135
#2  g_main_context_iterate (context=context@entry=0x7fb2b0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3835
#3  0x00007fb2d18f30fc in g_main_context_iteration (context=0x7fb2b0000990, may_block=may_block@entry=1) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3901
#4  0x00007fb2da1cadab in QEventDispatcherGlib::processEvents (this=0x7fb2b00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007fb2da17ad1a in QEventLoop::exec (this=this@entry=0x7fb2bcd1ad50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb2d9fd9f74 in QThread::exec (this=this@entry=0x7fb2dc276f00 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#7  0x00007fb2dc2045c5 in QDBusConnectionManager::run (this=0x7fb2dc276f00 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:189
#8  0x00007fb2d9fde41c in QThreadPrivate::start (arg=0x7fb2dc276f00 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#9  0x00007fb2d38da434 in start_thread (arg=0x7fb2bcd1b700) at pthread_create.c:334
#10 0x00007fb2d988d29d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb2be50c700 (LWP 10081)):
#0  0x00007fb2d98842dd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2cd97c8f2 in poll (__timeout=-1, __nfds=1, __fds=0x7fb2be50bc80) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x1b09390, cond=cond@entry=0x1b093d0, vector=vector@entry=0x0, count=count@entry=0x0) at /usr/src/debug/x11-libs/libxcb-1.12/libxcb-1.12/src/xcb_conn.c:479
#3  0x00007fb2cd97e6f7 in xcb_wait_for_event (c=0x1b09390) at /usr/src/debug/x11-libs/libxcb-1.12/libxcb-1.12/src/xcb_in.c:693
#4  0x00007fb2c0440ce9 in QXcbEventReader::run (this=0x1b1c3d0) at qxcbconnection.cpp:1325
#5  0x00007fb2d9fde41c in QThreadPrivate::start (arg=0x1b1c3d0) at thread/qthread_unix.cpp:341
#6  0x00007fb2d38da434 in start_thread (arg=0x7fb2be50c700) at pthread_create.c:334
#7  0x00007fb2d988d29d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb2c071c840 (LWP 10080)):
[KCrash Handler]
#6  QString::QString (other=..., this=0x210f850) at /usr/include/qt5/QtCore/qstring.h:889
#7  KDevelop::IPlugin::errorDescription (this=0x1df1240) at /usr/src/debug/dev-util/kdevplatform-9999/kdevplatform-9999/interfaces/iplugin.cpp:199
#8  0x00007fb2dbd8e779 in KDevelop::UiController::<lambda(KDevelop::IPlugin*)>::operator() (plugin=0x210f850, __closure=<synthetic pointer>) at /usr/src/debug/dev-util/kdevplatform-9999/kdevplatform-9999/shell/uicontroller.cpp:511
#9  KDevelop::UiController::showSettingsDialog (this=0x1bf1400) at /usr/src/debug/dev-util/kdevplatform-9999/kdevplatform-9999/shell/uicontroller.cpp:525
#10 0x00007fb2dbd74a7d in KDevelop::MainWindowPrivate::settingsDialog (this=<optimized out>) at /usr/src/debug/dev-util/kdevplatform-9999/kdevplatform-9999/shell/mainwindow_actions.cpp:112
#11 0x00007fb2dbe41e15 in KDevelop::MainWindowPrivate::qt_static_metacall (_o=0x1c56a90, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at /usr/src/debug/dev-util/kdevplatform-9999/kdevplatform-9999_build/shell/moc_mainwindow_p.cpp:221
#12 0x00007fb2da1a3718 in QMetaObject::activate (sender=sender@entry=0x1c5a3d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffede0a2b00) at kernel/qobject.cpp:3730
#13 0x00007fb2da1a3fe7 in QMetaObject::activate (sender=sender@entry=0x1c5a3d0, m=m@entry=0x7fb2daed9660 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffede0a2b00) at kernel/qobject.cpp:3595
#14 0x00007fb2da9f8af2 in QAction::triggered (this=this@entry=0x1c5a3d0, _t1=false) at .moc/moc_qaction.cpp:369
#15 0x00007fb2da9fb5f0 in QAction::activate (this=this@entry=0x1c5a3d0, event=event@entry=QAction::Trigger) at kernel/qaction.cpp:1163
#16 0x00007fb2dab66302 in QMenuPrivate::activateCausedStack (this=this@entry=0x1d1a5e0, causedStack=..., action=action@entry=0x1c5a3d0, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1130
#17 0x00007fb2dab6c4f6 in QMenuPrivate::activateAction (this=this@entry=0x1d1a5e0, action=action@entry=0x1c5a3d0, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1207
#18 0x00007fb2dab706c9 in QMenu::mouseReleaseEvent (this=<optimized out>, e=0x7ffede0a3130) at widgets/qmenu.cpp:2634
#19 0x00007fb2daa471a8 in QWidget::event (this=this@entry=0x1c14400, event=event@entry=0x7ffede0a3130) at kernel/qwidget.cpp:9114
#20 0x00007fb2dab7114b in QMenu::event (this=0x1c14400, e=0x7ffede0a3130) at widgets/qmenu.cpp:2748
#21 0x00007fb2daa01fbc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x1c14400, e=0x7ffede0a3130) at kernel/qapplication.cpp:3804
#22 0x00007fb2daa07cfe in QApplication::notify (this=<optimized out>, receiver=0x1c14400, e=0x7ffede0a3130) at kernel/qapplication.cpp:3277
#23 0x00007fb2da17beaa in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x1c14400, event=event@entry=0x7ffede0a3130) at kernel/qcoreapplication.cpp:1015
#24 0x00007fb2daa069f5 in QCoreApplication::sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:225
#25 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x1c14400, event=event@entry=0x7ffede0a3130, alienWidget=0x0, alienWidget@entry=0x1c14400, nativeWidget=0x1c14400, buttonDown=buttonDown@entry=0x7fb2daf04a90 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2775
#26 0x00007fb2daa61cf7 in QWidgetWindow::handleMouseEvent (this=this@entry=0x1c5b050, event=event@entry=0x7ffede0a3540) at kernel/qwidgetwindow.cpp:501
#27 0x00007fb2daa63fb3 in QWidgetWindow::event (this=0x1c5b050, event=0x7ffede0a3540) at kernel/qwidgetwindow.cpp:233
#28 0x00007fb2daa01fbc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x1c5b050, e=0x7ffede0a3540) at kernel/qapplication.cpp:3804
#29 0x00007fb2daa074a6 in QApplication::notify (this=0x7ffede0a3ad0, receiver=0x1c5b050, e=0x7ffede0a3540) at kernel/qapplication.cpp:3561
#30 0x00007fb2da17beaa in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x1c5b050, event=event@entry=0x7ffede0a3540) at kernel/qcoreapplication.cpp:1015
#31 0x00007fb2da4b48fb in QCoreApplication::sendSpontaneousEvent (event=0x7ffede0a3540, receiver=0x1c5b050) at ../../src/corelib/kernel/qcoreapplication.h:228
#32 QGuiApplicationPrivate::processMouseEvent (e=0x36cd7d0) at kernel/qguiapplication.cpp:1877
#33 0x00007fb2da4b6435 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x36cd7d0) at kernel/qguiapplication.cpp:1661
#34 0x00007fb2da49720b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:648
#35 0x00007fb2c0476be0 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#36 0x00007fb2d18f2df7 in g_main_dispatch (context=0x7fb2b80016f0) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3154
#37 g_main_context_dispatch (context=context@entry=0x7fb2b80016f0) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3769
#38 0x00007fb2d18f3050 in g_main_context_iterate (context=context@entry=0x7fb2b80016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3840
#39 0x00007fb2d18f30fc in g_main_context_iteration (context=0x7fb2b80016f0, may_block=may_block@entry=1) at /usr/src/debug/dev-libs/glib-2.48.1-r1/glib-2.48.1/glib/gmain.c:3901
#40 0x00007fb2da1cad8f in QEventDispatcherGlib::processEvents (this=0x1b731c0, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#41 0x00007fb2da17ad1a in QEventLoop::exec (this=this@entry=0x7ffede0a38f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#42 0x00007fb2da1827cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#43 0x00007fb2da4abccc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1607
#44 0x00007fb2da9fef75 in QApplication::exec () at kernel/qapplication.cpp:2979
#45 0x000000000040b956 in main (argc=1, argv=<optimized out>) at /usr/src/debug/dev-util/kdevelop-9999/kdevelop-9999/app/main.cpp:746

Reported using DrKonqi