Description of problem:

In current cauldron with plasma 5.5.3:

Application: KMouseTool (kmousetool), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f2ba1dbded0 in __memcpy_sse2_unaligned () at /lib64/libc.so.6
#7  0x00007f2ba318a76b in QByteArray::append(char const*) () at /lib64/libQtCore.so.4
#8  0x00007f2b8b7284f0 in QMetaTypeIdQObject<QWidget*, 8>::qt_metatype_id() () at /usr/lib64/libQt5Widgets.so.5
#9  0x00007f2b8b6c73f7 in _GLOBAL__sub_I_qwidgetsvariant.cpp () at /usr/lib64/libQt5Widgets.so.5
#10 0x00007f2ba49190ca in call_init.part () at /lib64/ld-linux-x86-64.so.2
#11 0x00007f2ba49191db in _dl_init () at /lib64/ld-linux-x86-64.so.2
#12 0x00007f2ba491d272 in dl_open_worker () at /lib64/ld-linux-x86-64.so.2
#13 0x00007f2ba4918f74 in _dl_catch_error () at /lib64/ld-linux-x86-64.so.2
#14 0x00007f2ba491c9b1 in _dl_open () at /lib64/ld-linux-x86-64.so.2
#15 0x00007f2b9f3b5fc9 in dlopen_doit () at /lib64/libdl.so.2
#16 0x00007f2ba4918f74 in _dl_catch_error () at /lib64/ld-linux-x86-64.so.2
#17 0x00007f2b9f3b6631 in _dlerror_run () at /lib64/libdl.so.2
#18 0x00007f2b9f3b6061 in dlopen () at /lib64/libdl.so.2
#19 0x00007f2b9099cf1f in module_Load () at /lib64/libvlccore.so.8
#20 0x00007f2b9098194d in module_InitDynamic () at /lib64/libvlccore.so.8
#21 0x00007f2b90981c48 in AllocatePluginDir () at /lib64/libvlccore.so.8
#22 0x00007f2b90981b94 in AllocatePluginDir () at /lib64/libvlccore.so.8
#23 0x00007f2b909820f4 in AllocatePluginPath () at /lib64/libvlccore.so.8
#24 0x00007f2b909826ba in module_LoadPlugins () at /lib64/libvlccore.so.8
#25 0x00007f2b9090ae3a in libvlc_InternalInit () at /lib64/libvlccore.so.8
#26 0x00007f2b906dce0e in libvlc_new () at /lib64/libvlc.so.5
#27 0x00007f2b90c26675 in LibVLC::init() () at /usr/lib64/kde4/plugins/phonon_backend/phonon_vlc.so
#28 0x00007f2b90c0c448 in Phonon::VLC::Backend::Backend(QObject*, QList<QVariant> const&) () at /usr/lib64/kde4/plugins/phonon_backend/phonon_vlc.so
#29 0x00007f2b90c0cfc3 in qt_plugin_instance () at /usr/lib64/kde4/plugins/phonon_backend/phonon_vlc.so
#30 0x00007f2ba3271a6b in QPluginLoader::instance() () at /lib64/libQtCore.so.4
#31 0x00007f2b928fe701 in Phonon::KdePlatformPlugin::createBackend(KSharedPtr<KService>) () at /usr/lib64/kde4/plugins/phonon_platform/kde.so
#32 0x00007f2b928fee7b in Phonon::KdePlatformPlugin::createBackend() () at /usr/lib64/kde4/plugins/phonon_platform/kde.so
#33 0x00007f2ba4047a5e in Phonon::FactoryPrivate::createBackend() () at /lib64/libphonon.so.4
#34 0x00007f2ba40481a8 in Phonon::Factory::backend(bool) () at /lib64/libphonon.so.4
#35 0x00007f2ba4048882 in Phonon::Factory::createAudioOutput(QObject*) () at /lib64/libphonon.so.4
#36 0x00007f2ba4040f69 in Phonon::AudioOutputPrivate::createBackendObject() () at /lib64/libphonon.so.4
#37 0x00007f2ba403e271 in Phonon::AudioOutputPrivate::init(Phonon::Category) () at /lib64/libphonon.so.4
#38 0x00007f2ba40527d2 in Phonon::createPlayer(Phonon::Category, Phonon::MediaSource const&) () at /lib64/libphonon.so.4
#39 0x000000000040b3aa in KMouseTool::init_vars() ()
#40 0x000000000040c149 in KMouseTool::KMouseTool(QWidget*, char const*) ()
#41 0x00000000004076d6 in main ()


Version-Release number of selected component (if applicable):


How reproducible:every time


Steps to Reproduce:
1.install plasma5 only DE from Mageia-6-dev1-x86_64-DVD, reboot
2.login to Plasma5
3.attempt to start kmouse tool


Reproducible: 

Steps to Reproduce: