8031359: Invocable.getInterface() works incorrectly if interface has default methods
Reviewed-by: attila, hannesw
x = undefined
y = undefined
z = undefined
s = undefined
u = undefined
r = undefined
t = undefined
ReferenceError: "q" is not defined
b = 10
ReferenceError: "b" is not defined
Value of 'a' inside the function 20
Value of 'a' outside the function 10