re PR c++/70036 ([concepts] ICE with a dependent sizeof in a concept)

	PR c++/70036

	* parser.c (cp_parser_requires_clause): Call
	check_for_bare_parameter_packs.

From-SVN: r233886

gcc/cp/ChangeLog

 2016-03-01  Jason Merrill  <jason@redhat.com>
 
+	PR c++/70036
+	* parser.c (cp_parser_requires_clause): Call
+	check_for_bare_parameter_packs.
+
 	PR c++/51489
 	* constexpr.c (cxx_eval_binary_expression): Don't VERIFY_CONSTANT
 	the operands.

gcc/cp/parser.c

@@ -24206,6 +24206,8 @@ cp_parser_requires_clause (cp_parser *parser)
   ++processing_template_decl;
   tree expr = cp_parser_binary_expression (parser, false, false,
 					   PREC_NOT_OPERATOR, NULL);
+  if (check_for_bare_parameter_packs (expr))
+    expr = error_mark_node;
   --processing_template_decl;
   return expr;
 }

gcc/testsuite/g++.dg/concepts/variadic3.C

+// PR c++/70036
+// { dg-do compile { target c++14 } }
+// { dg-options "-fconcepts" }
+
+template <class T> concept bool C = true;
+
+template <class... T>
+void f(T...) requires C<T>;	// { dg-error "parameter pack" }