src/v8/test/message/fail/arrow-invalid-rest.out - cobalt - Git at Google

 *%(basename)s:7: SyntaxError: Rest parameter may not have a default initializer
 var f = (...x = 10) => x;
             ^
 SyntaxError: Rest parameter may not have a default initializer
	*%(basename)s:7: SyntaxError: Rest parameter may not have a default initializer
	var f = (...x = 10) => x;
	^
	SyntaxError: Rest parameter may not have a default initializer