    JS ERROR: !!!   Exception was: Error: No property 'source' in property list (or its value was undefined)
    JS ERROR: !!!     lineNumber = '0'
    JS ERROR: !!!     fileName = 'gjs_throw'
    JS ERROR: !!!     stack = '("No property 'source' in property list (or its value was undefined)")@gjs_throw:0
(279,228)@/home/ron/gnome-shell/source/gnome-shell/js/ui/searchDisplay.js:84
(279,228,91986)@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:247
([object _private_St_Button],[object _private_GLib_ParamSpec])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:146
([object _private_St_Button],[object _private_GLib_ParamSpec])@/home/ron/gnome-shell/install/share/gjs-1.0/lang.js:110
'
    JS ERROR: !!!     message = 'No property 'source' in property list (or its value was undefined)'
    JS ERROR: !!!   Exception was: TypeError: this._dragActor is undefined
    JS ERROR: !!!     lineNumber = '410'
    JS ERROR: !!!     fileName = '/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js'
    JS ERROR: !!!     stack = '([object _private_Clutter_Event])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:410
([object _private_Clutter_Rectangle],[object _private_Clutter_Event])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:187
([object _private_Clutter_Rectangle],[object _private_Clutter_Event])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:54
'
    JS ERROR: !!!     message = 'this._dragActor is undefined'
    JS ERROR: !!!   Exception was: TypeError: this._dragActor is undefined
    JS ERROR: !!!     lineNumber = '410'
    JS ERROR: !!!     fileName = '/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js'
    JS ERROR: !!!     stack = '([object _private_Clutter_Event])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:410
([object _private_Clutter_Rectangle],[object _private_Clutter_Event])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:187
([object _private_Clutter_Rectangle],[object _private_Clutter_Event])@/home/ron/gnome-shell/source/gnome-shell/js/ui/dnd.js:54
