PR c++/79508 - lookup error with member template

	* parser.c (cp_parser_template_name): Clear
	parser->context->object_type if we aren't doing lookup.

From-SVN: r245553

gcc/cp/ChangeLog

 2017-02-17  Jason Merrill  <jason@redhat.com>
 
+	PR c++/79508 - lookup error with member template
+	* parser.c (cp_parser_template_name): Clear
+	parser->context->object_type if we aren't doing lookup.
+
 	PR c++/78690 - ICE with using and global type with same name
 	* pt.c (type_dependent_object_expression_p): True for
 	IDENTIFIER_NODE.

gcc/cp/parser.c

@@ -15719,6 +15719,7 @@ cp_parser_template_name (cp_parser* parser,
 	    cp_lexer_purge_tokens_after (parser->lexer, start);
 	  if (is_identifier)
 	    *is_identifier = true;
+	  parser->context->object_type = NULL_TREE;
 	  return identifier;
 	}
 
@@ -15730,7 +15731,12 @@ cp_parser_template_name (cp_parser* parser,
 	  && (!parser->scope
 	      || (TYPE_P (parser->scope)
 		  && dependent_type_p (parser->scope))))
-	return identifier;
+	{
+	  /* We're optimizing away the call to cp_parser_lookup_name, but we
+	     still need to do this.  */
+	  parser->context->object_type = NULL_TREE;
+	  return identifier;
+	}
     }
 
   /* Look up the name.  */

gcc/testsuite/g++.dg/template/memtmpl5.C

+// PR c++/79508
+
+struct C
+{
+  template< void(*F)()> void set_default() { 	}	
+};
+
+
+template <class T> void random_positive()
+{
+}
+
+template<class T> void initialize(T& x)
+{
+  x.template set_default<random_positive<T> >();
+}
+
+int main ()
+{
+  C x;
+  initialize<C>(x);
+}