Bug 347530

Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-16-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
Having just upgraded from 14:10 to 15:04 (Kubuntu) I did not like the Breeze look and feel and wanted the old one back. In the "systeminnstillinger" window (Sorry Norwegian name - another thing I would also change) in "Utseende" ->Programstil I got to select Oxygen and "Hent nye dekorasjoner" used the Apply (untranslated) and back to "Oversikt". This chrashed, and still only Breeze is available.


- Custom settings of the application:

The crash can be reproduced every time.

-- Backtrace:
Application: Systeminnstillinger (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f53907d2780 (LWP 951))]

Thread 5 (Thread 0x7f537df7f700 (LWP 952)):
#0  0x00007f538cf418dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f538b25bb72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f538b25d64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5380d3e099 in QXcbEventReader::run (this=0x756850) at qxcbconnection.cpp:1105
#4  0x00007f538d5c2b0e in QThreadPrivate::start (arg=0x756850) at thread/qthread_unix.cpp:337
#5  0x00007f538a1756aa in start_thread (arg=0x7f537df7f700) at pthread_create.c:333
#6  0x00007f538cf4ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f536fd91700 (LWP 954)):
#0  0x00007f538cf418dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5389c56ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5389c57242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5377827ae6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f5389c7d955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f538a1756aa in start_thread (arg=0x7f536fd91700) at pthread_create.c:333
#6  0x00007f538cf4ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f536f590700 (LWP 956)):
#0  0x00007f538cf3d49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f53860c9f45 in ?? () from /usr/lib/nvidia-340/tls/libnvidia-tls.so.340.76
#2  0x00007f5389c9a2f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5389c5696c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5389c56e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5389c56fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f5389c57009 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f5389c7d955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f538a1756aa in start_thread (arg=0x7f536f590700) at pthread_create.c:333
#9  0x00007f538cf4ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f5346e97700 (LWP 2003)):
#0  0x00007f538cf418dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5389c56ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5389c56fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f538d859c6c in QEventDispatcherGlib::processEvents (this=0x7f53380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f538d7fe3e2 in QEventLoop::exec (this=this@entry=0x7f5346e96e40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f538d5bdb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f538d5c2b0e in QThreadPrivate::start (arg=0x1c16280) at thread/qthread_unix.cpp:337
#7  0x00007f538a1756aa in start_thread (arg=0x7f5346e97700) at pthread_create.c:333
#8  0x00007f538cf4ceed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f53907d2780 (LWP 951)):
[KCrash Handler]
#6  0x00007f538c4a9f97 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f538c454151 in QV4::ExecutionEngine::~ExecutionEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f538c58c0d5 in QV8Engine::~QV8Engine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f538c58c2b9 in QV8Engine::~QV8Engine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f538c3f1061 in QJSEngine::~QJSEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f538c4ee3c5 in QQmlEngine::~QQmlEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f538c4ee499 in QQmlEngine::~QQmlEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f53493d1be2 in cleanup (pointer=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:54
#14 reset (other=0x0, this=0x7f534965f6c8 <Aurorae::Helper::instance()::s_helper+8>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:149
#15 Aurorae::Helper::unref (this=0x7f534965f6c0 <Aurorae::Helper::instance()::s_helper>) at ../../../../clients/aurorae/src/aurorae.cpp:119
#16 0x00007f53493d5908 in unref (this=<optimized out>) at ../../../../clients/aurorae/src/aurorae.cpp:273
#17 Aurorae::Decoration::~Decoration (this=0x246c310, __in_chrg=<optimized out>) at ../../../../clients/aurorae/src/aurorae.cpp:267
#18 0x00007f53493d5929 in Aurorae::Decoration::~Decoration (this=0x246c310, __in_chrg=<optimized out>) at ../../../../clients/aurorae/src/aurorae.cpp:280
#19 0x00007f538d832778 in QObject::event (this=0x246c310, e=<optimized out>) at kernel/qobject.cpp:1236
#20 0x00007f538e5ecb2c in QApplicationPrivate::notify_helper (this=0x728430, receiver=0x246c310, e=0x15d3a10) at kernel/qapplication.cpp:3720
#21 0x00007f538e5f2000 in QApplication::notify (this=0x7ffe80fbba90, receiver=0x246c310, e=0x15d3a10) at kernel/qapplication.cpp:3503
#22 0x00007f538d800c2b in QCoreApplication::notifyInternal (this=0x7ffe80fbba90, receiver=0x246c310, event=event@entry=0x15d3a10) at kernel/qcoreapplication.cpp:935
#23 0x00007f538d802c9b in sendEvent (event=0x15d3a10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#24 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x727650) at kernel/qcoreapplication.cpp:1552
#25 0x00007f538d803298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#26 0x00007f538d859843 in postEventSourceDispatch (s=0x8abd30) at kernel/qeventdispatcher_glib.cpp:271
#27 0x00007f5389c56c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f5389c56f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f5389c56fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f538d859c57 in QEventDispatcherGlib::processEvents (this=0x8abc20, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#31 0x00007f538d7fe3e2 in QEventLoop::exec (this=this@entry=0x7ffe80fbb970, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#32 0x00007f538d80602c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#33 0x00007f538e02731c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#34 0x00007f538e5e87a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#35 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi