PR c++/9127
	* cp-tree.h (at_namespace_scope_p): New function.
	* parser.c (cp_parser_class_head): Handle invalid explicit
	specializations.
	* search.c (at_namespace_scope_p): New function.

	PR c++/9127
	* g++.dg/template/error6.C: New test.

From-SVN: r74274