contract C {
	modifier this { _; }
	modifier super { _; }
	modifier _ { _; }
}
// ----
// DeclarationError 3726: (14-34): The name "this" is reserved.
// DeclarationError 3726: (36-57): The name "super" is reserved.
// DeclarationError 3726: (59-76): The name "_" is reserved.
// Warning 2319: (14-34): This declaration shadows a builtin symbol.
// Warning 2319: (36-57): This declaration shadows a builtin symbol.