8132382: [macosx] Crash during JMC or JavaFX execution when NSApplication is controlled by SWT or JavaFX libraries
Reviewed-by: kizune, alexsch
delete x? false
typeof x = number
delete f? true
typeof f = undefined
delete foo? false
typeof foo = number
delete func? false
typeof func = function
delete foo? false
typeof foo? number
foo = 33
x in function = local
delete x? = true
x after delete = global
x = global