Bug 399721

Application: dolphin (18.08.2)

Qt Version: 5.11.2
Frameworks Version: 5.50.0
Operating System: Linux 4.12.14-lp150.12.19-default x86_64
Distribution: "openSUSE Leap 15.0"

-- Information about the crash:
- What I was doing when the application crashed:
Starting Dolphin. Tried from the terminal as well, Dolphin crashes before printing anything on stdout. Happends everytime I try to start Dolphin. Also tested on a fresh user, same behaviour.

-Bug reported to openSUSE whose maintainer asked me to follow up upstream:
https://bugzilla.opensuse.org/show_bug.cgi?id=1111611

-Supplementary information: openSUSE Leap, but using KDE repositories, so fairly up-to-date system (see system information)

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f75b245b900 (LWP 13881))]

Thread 3 (Thread 0x7f75939ef700 (LWP 13883)):
#0  0x00007f75b1cf108b in poll () from /lib64/libc.so.6
#1  0x00007f75a482e109 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f758c002de0, timeout=<optimized out>, context=0x7f758c000be0) at gmain.c:4169
#2  g_main_context_iterate (context=context@entry=0x7f758c000be0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3863
#3  0x00007f75a482e21c in g_main_context_iteration (context=0x7f758c000be0, may_block=may_block@entry=1) at gmain.c:3929
#4  0x00007f75abe723cb in QEventDispatcherGlib::processEvents (this=0x7f758c000b10, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f75abe1670a in QEventLoop::exec (this=this@entry=0x7f75939eec80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f75abc41aaa in QThread::exec (this=this@entry=0x7f75ac533d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:525
#7  0x00007f75ac2bbb75 in QDBusConnectionManager::run (this=0x7f75ac533d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f75abc4c9cb in QThreadPrivate::start (arg=0x7f75ac533d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:367
#9  0x00007f75a6f0a559 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f75b1cfb82f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f759a7b3700 (LWP 13882)):
#0  0x00007f75b1cf108b in poll () from /lib64/libc.so.6
#1  0x00007f75a3e7b387 in poll (__timeout=-1, __nfds=1, __fds=0x7f759a7b2bb8) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x559b8272d820, cond=cond@entry=0x559b8272d860, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:479
#3  0x00007f75a3e7cfaa in xcb_wait_for_event (c=0x559b8272d820) at xcb_in.c:697
#4  0x00007f759d782bd9 in QXcbEventReader::run (this=0x559b8272cd70) at qxcbconnection.cpp:1391
#5  0x00007f75abc4c9cb in QThreadPrivate::start (arg=0x559b8272cd70) at thread/qthread_unix.cpp:367
#6  0x00007f75a6f0a559 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f75b1cfb82f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f75b245b900 (LWP 13881)):
[KCrash Handler]
#6  QArrayData::data (this=0x50c880) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:61
#7  QTypedArrayData<char>::data (this=0x50c880) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:206
#8  QByteArray::data (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qbytearray.h:491
#9  rawStringData (index=<optimized out>, mo=<optimized out>) at kernel/qmetaobject.cpp:161
#10 objectClassName (m=<optimized out>) at kernel/qmetaobject.cpp:306
#11 QMetaObject::className (this=<optimized out>) at kernel/qmetaobject.cpp:316
#12 0x00007f75ace7ffb4 in QApplication::font (widget=widget@entry=0x559b82832470) at kernel/qapplication.cpp:1542
#13 0x00007f75acebe69b in QWidget::event (this=0x559b82832470, event=<optimized out>) at kernel/qwidget.cpp:9010
#14 0x00007f75ace7ef9c in QApplicationPrivate::notify_helper (this=this@entry=0x559b82719460, receiver=receiver@entry=0x559b82832470, e=e@entry=0x7ffe34ee8ef0) at kernel/qapplication.cpp:3728
#15 0x00007f75ace8657f in QApplication::notify (this=0x7ffe34ee9680, receiver=0x559b82832470, e=0x7ffe34ee8ef0) at kernel/qapplication.cpp:3487
#16 0x00007f75abe183d8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x559b82832470, event=event@entry=0x7ffe34ee8ef0) at kernel/qcoreapplication.cpp:1048
#17 0x00007f75aceb9a33 in QCoreApplication::sendEvent (event=0x7ffe34ee8ef0, receiver=0x559b82832470) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#18 QWidget::ensurePolished (this=this@entry=0x559b82832470) at kernel/qwidget.cpp:10168
#19 0x00007f75acebd6a9 in QWidget::setVisible (this=0x559b82832470, visible=<optimized out>) at kernel/qwidget.cpp:8297
#20 0x00007f75acf94459 in QDockWidgetLayout::setWidgetForRole (this=0x559b8284ade0, r=QDockWidgetLayout::FloatButton, w=0x559b82832470) at widgets/qdockwidget.cpp:460
#21 0x00007f75acf945e7 in QDockWidgetPrivate::init (this=0x7f75940053e0) at widgets/qdockwidget.cpp:653
#22 0x00007f75acf94926 in QDockWidget::QDockWidget (this=0x559b8285e190, title=..., parent=<optimized out>, flags=...) at widgets/qdockwidget.cpp:1281
#23 0x00007f75b2057c79 in DolphinDockWidget::DolphinDockWidget(QString const&, QWidget*, QFlags<Qt::WindowType>) () from /usr/lib64/libkdeinit5_dolphin.so
#24 0x00007f75b200c495 in DolphinMainWindow::setupDockWidgets() () from /usr/lib64/libkdeinit5_dolphin.so
#25 0x00007f75b200f3db in DolphinMainWindow::DolphinMainWindow() () from /usr/lib64/libkdeinit5_dolphin.so
#26 0x00007f75b2003730 in kdemain () from /usr/lib64/libkdeinit5_dolphin.so
#27 0x00007f75b1c23f4a in __libc_start_main () from /lib64/libc.so.6
#28 0x0000559b821787fa in _start ()

Reported using DrKonqi