Comment 2 for bug 852582

StacktraceTop:
 UnityScreen::~UnityScreen (this=0x1ed7280, __in_chrg=<optimized out>) at /build/buildd/unity-4.16.0/plugins/unityshell/src/unityshell.cpp:311
 UnityScreen::~UnityScreen (this=0x1ed7280, __in_chrg=<optimized out>) at /build/buildd/unity-4.16.0/plugins/unityshell/src/unityshell.cpp:335
 getInstance (base=<optimized out>) at /usr/include/compiz/core/pluginclasshandler.h:170
 PluginClassHandler<UnityScreen, CompScreen, 0>::get (base=0x1c7a1d0) at /usr/include/compiz/core/pluginclasshandler.h:196
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen (this=<optimized out>, s=<optimized out>) at /usr/include/compiz/core/plugin.h:232