Bug 360254

Application: yakuake (3.0.2)

Qt Version: 5.5.1
Operating System: Linux 4.2.6-1-CHAKRA x86_64
Distribution: "Chakra"

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

- disconnect hdmi cable from external monitor
or
- turn off laptop screen, turn on external monitor screen and vice versa

The crash can be reproduced sometimes.

-- Backtrace:
Application: Yakuake (yakuake), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb742747800 (LWP 29648))]

Thread 2 (Thread 0x7fb740af9700 (LWP 29649)):
#0  0x00007fb74f04f18d in poll () from /usr/lib/libc.so.6
#1  0x00007fb74d5baae2 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007fb74d5bc757 in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007fb74241c889 in QXcbEventReader::run (this=0xca7030) at qxcbconnection.cpp:1229
#4  0x00007fb74f73ab7e in QThreadPrivate::start (arg=0xca7030) at thread/qthread_unix.cpp:331
#5  0x00007fb74bcb7464 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007fb74f05812d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7fb742747800 (LWP 29648)):
[KCrash Handler]
#6  QScreen::handle (this=0x0) at kernel/qscreen.cpp:112
#7  0x00007fb74243bcc9 in QXcbBackingStore::resize (this=0xf7db00, size=...) at qxcbbackingstore.cpp:440
#8  0x00007fb750218e96 in QWidgetBackingStore::doSync (this=this@entry=0xf84380) at kernel/qwidgetbackingstore.cpp:1063
#9  0x00007fb75021a4ec in QWidgetBackingStore::sync (this=0xf84380) at kernel/qwidgetbackingstore.cpp:1032
#10 0x00007fb75023869f in QWidgetPrivate::syncBackingStore (this=0xd84a80) at kernel/qwidget.cpp:1907
#11 0x00007fb75024fc98 in QWidget::event (this=this@entry=0x7ffec35f7e60, event=event@entry=0x1080150) at kernel/qwidget.cpp:8986
#12 0x00007fb750347d6b in QMainWindow::event (this=0x7ffec35f7e60, event=0x1080150) at widgets/qmainwindow.cpp:1495
#13 0x00007fb75020ca5c in QApplicationPrivate::notify_helper (this=this@entry=0xc90410, receiver=receiver@entry=0x7ffec35f7e60, e=e@entry=0x1080150) at kernel/qapplication.cpp:3716
#14 0x00007fb750211f36 in QApplication::notify (this=0x7ffec35f7e30, receiver=0x7ffec35f7e60, e=0x1080150) at kernel/qapplication.cpp:3499
#15 0x00007fb74f91bbeb in QCoreApplication::notifyInternal (this=0x7ffec35f7e30, receiver=0x7ffec35f7e60, event=event@entry=0x1080150) at kernel/qcoreapplication.cpp:965
#16 0x00007fb74f91dfe6 in QCoreApplication::sendEvent (event=0x1080150, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc8fd70) at kernel/qcoreapplication.cpp:1593
#18 0x00007fb74f91e4c8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#19 0x00007fb74f972183 in postEventSourceDispatch (s=0xcd1950) at kernel/qeventdispatcher_glib.cpp:271
#20 0x00007fb74a42efba in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0x00007fb74a42f248 in ?? () from /usr/lib/libglib-2.0.so.0
#22 0x00007fb74a42f322 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0x00007fb74f97258f in QEventDispatcherGlib::processEvents (this=0xcc5930, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#24 0x00007fb74f9195ba in QEventLoop::exec (this=this@entry=0x7ffec35f7d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#25 0x00007fb74f92157c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#26 0x00000000004149c5 in ?? ()
#27 0x00007fb74ef8f610 in __libc_start_main () from /usr/lib/libc.so.6
#28 0x0000000000414a49 in _start ()

Reported using DrKonqi