Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-15-generic x86_64
Distribution: Ubuntu 15.04

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

在“获得百宝箱”中安装了几个主题，在反复切换时崩溃。
并且在切换时会有选择不同主题后，“应用”按钮仍为不可点击的现象

系统：ubuntu 15.04
GPU：GTX970

-- Backtrace:
Application: 系统设置 (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f033c15d780 (LWP 4387))]

Thread 3 (Thread 0x7f0329a54700 (LWP 4388)):
#0  0x00007f03388bd8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0336bd7b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f0336bd964f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f032c7e7099 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007f0338f3eb0e in QThreadPrivate::start (arg=0x1d7b0d0) at thread/qthread_unix.cpp:337
#5  0x00007f0335af16aa in start_thread (arg=0x7f0329a54700) at pthread_create.c:333
#6  0x00007f03388c8eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f031d02f700 (LWP 4389)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f031d1ad644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f031d1ad689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f0335af16aa in start_thread (arg=0x7f031d02f700) at pthread_create.c:333
#4  0x00007f03388c8eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f033c15d780 (LWP 4387)):
[KCrash Handler]
#6  0x00007f0337e25f97 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f0337dd0151 in QV4::ExecutionEngine::~ExecutionEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f0337f080d5 in QV8Engine::~QV8Engine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f0337f082b9 in QV8Engine::~QV8Engine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f0337d6d061 in QJSEngine::~QJSEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f0337e6a3c5 in QQmlEngine::~QQmlEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f0337e6a499 in QQmlEngine::~QQmlEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f02878a5be2 in cleanup (pointer=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:54
#14 reset (other=0x0, this=0x7f0287b336c8 <Aurorae::Helper::instance()::s_helper+8>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:149
#15 Aurorae::Helper::unref (this=0x7f0287b336c0 <Aurorae::Helper::instance()::s_helper>) at ../../../../clients/aurorae/src/aurorae.cpp:119
#16 0x00007f02878a9908 in unref (this=<optimized out>) at ../../../../clients/aurorae/src/aurorae.cpp:273
#17 Aurorae::Decoration::~Decoration (this=0x2716640, __in_chrg=<optimized out>) at ../../../../clients/aurorae/src/aurorae.cpp:267
#18 0x00007f02878a9929 in Aurorae::Decoration::~Decoration (this=0x2716640, __in_chrg=<optimized out>) at ../../../../clients/aurorae/src/aurorae.cpp:280
#19 0x00007f03391ae778 in QObject::event (this=0x2716640, e=<optimized out>) at kernel/qobject.cpp:1236
#20 0x00007f0339f68b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f0339f6e000 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f033917cc2b in QCoreApplication::notifyInternal (this=0x7ffcb41c08a0, receiver=0x2716640, event=event@entry=0x246fac0) at kernel/qcoreapplication.cpp:935
#23 0x00007f033917ec9b in sendEvent (event=0x246fac0, 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=0x1d4ebf0) at kernel/qcoreapplication.cpp:1552
#25 0x00007f033917f298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#26 0x00007f03391d5843 in postEventSourceDispatch (s=0x1db7460) at kernel/qeventdispatcher_glib.cpp:271
#27 0x00007f03355d2c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f03355d2f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f03355d2fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f03391d5c57 in QEventDispatcherGlib::processEvents (this=0x1db7440, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#31 0x00007f033917a3e2 in QEventLoop::exec (this=this@entry=0x7ffcb41c0780, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#32 0x00007f033918202c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#33 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi