PR c++/84082
	* parser.c (cp_parser_dot_deref_incomplete): New function.
	(cp_parser_postfix_dot_deref_expression): Use it.

	* g++.dg/template/incomplete11.C: New test.
	* g++.dg/parse/crash67.C: Expect an incomplete type diagnostics too.

From-SVN: r257466