re PR c++/84493 (ICE with invalid cast)

	PR c++/84493
	* parser.c (cp_parser_braced_list): Use require_open instead of
	consume_open.

	* g++.dg/parse/error59.C: New test.

From-SVN: r257899

gcc/cp/ChangeLog

+2018-02-22  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/84493
+	* parser.c (cp_parser_braced_list): Use require_open instead of
+	consume_open.
+
 2018-02-21  Jason Merrill  <jason@redhat.com>
 
 	PR c++/84454 - ICE with pack expansion in signature.

gcc/cp/parser.c

@@ -21925,7 +21925,7 @@ cp_parser_braced_list (cp_parser* parser, bool* non_constant_p)
 
   /* Consume the `{' token.  */
   matching_braces braces;
-  braces.consume_open (parser);
+  braces.require_open (parser);
   /* Create a CONSTRUCTOR to represent the braced-initializer.  */
   initializer = make_node (CONSTRUCTOR);
   /* If it's not a `}', then there is a non-trivial initializer.  */

gcc/testsuite/ChangeLog

+2018-02-22  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/84493
+	* g++.dg/parse/error59.C: New test.
+
 2018-02-22  Tom de Vries  <tom@codesourcery.com>
 
 	* gcc.c-torture/execute/pr82210.c: Require effective target alloca.

gcc/testsuite/g++.dg/parse/error59.C

+// PR c++/84493
+
+void foo()
+{
+  (struct {}x){}; // { dg-error "" }
+}