PR c++/12762
	* parser.c (cp_parser_enclosed_template_argument_list): New
	function.
	(cp_parser_template_id): Use it.
	(cp_parser_simple_type_specifier): Recognize invalid template
	syntax.

	PR c++/12762
	* g++.dg/template/error3.C: New test.

From-SVN: r73610