Description of problem:
Crash when auto-logging-in to plasmashell.

plasmashell had rendered the wallpaper, the desktop menu button and a thin slither of the bottom panel, in the bottom right side, as well as the Application Launcher button. However, the rest of the panel was transparent and failed to load before plasmashell crashed.

Version-Release number of selected component:
plasma-workspace-5.3.2-2.fc22

Additional info:
reporter:       libreport-2.6.1
backtrace_rating: 4
cmdline:        /bin/plasmashell --shut-up
crash_function: QReadLocker::relock()
executable:     /usr/bin/plasmashell
global_pid:     1898
kernel:         4.0.8-300.fc22.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 QReadLocker::relock() at ../../src/corelib/thread/qreadwritelock.h:98
 #1 QMetaType::typeInfo(int) at ../../src/corelib/thread/qreadwritelock.h:117
 #6 QMetaType::QMetaType(int) at kernel/qmetatype.cpp:2235
 #7 (anonymous namespace)::customConstruct(QVariant::Private*, void const*) at kernel/qvariant.cpp:854
 #8 QVariant::QVariant(QVariant const&) at kernel/qvariant.cpp:1217
 #9 QObject::property(char const*) const at ../../src/corelib/tools/qlist.h:682
 #10 PanelView::containmentContainsPosition(QPointF const&) const at ../../shell/panelview.cpp:783
 #11 PanelView::event(QEvent*) at ../../shell/panelview.cpp:703
 #12 QApplicationPrivate::notify_helper(QObject*, QEvent*) at kernel/qapplication.cpp:3720
 #13 QApplication::notify(QObject*, QEvent*) at kernel/qapplication.cpp:3503