8031359: Invocable.getInterface() works incorrectly if interface has default methods
Reviewed-by: attila, hannesw
SyntaxError:33:Expected property id but found ,
({,})
^
SyntaxError:33:Expected property id but found ,
({, a:2 })
^
SyntaxError:33:Expected property id but found ,
({a:3,,})
^
SyntaxError:33:Expected comma but found ident
({a:3 b:2}
^