re PR c++/77637 (ICE on x86_64-linux-gnu (Segmentation fault, tree_check,…

re PR c++/77637 (ICE on x86_64-linux-gnu (Segmentation fault, tree_check, cp_parser_std_attribute_list...))

	PR c++/77637
	* parser.c (cp_parser_std_attribute_list): Reject ... without
	preceding attribute.

	* g++.dg/cpp0x/gen-attrs-62.C: New test.

From-SVN: r240265

gcc/cp/ChangeLog

+2016-09-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/77637
+	* parser.c (cp_parser_std_attribute_list): Reject ... without
+	preceding attribute.
+
 2016-09-19  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR c++/77434

gcc/cp/parser.c

@@ -24221,8 +24221,12 @@ cp_parser_std_attribute_list (cp_parser *parser, tree attr_ns)
       if (token->type == CPP_ELLIPSIS)
 	{
 	  cp_lexer_consume_token (parser->lexer);
-	  TREE_VALUE (attribute)
-	    = make_pack_expansion (TREE_VALUE (attribute));
+	  if (attribute == NULL_TREE)
+	    error_at (token->location,
+		      "expected attribute before %<...%>");
+	  else
+	    TREE_VALUE (attribute)
+	      = make_pack_expansion (TREE_VALUE (attribute));
 	  token = cp_lexer_peek_token (parser->lexer);
 	}
       if (token->type != CPP_COMMA)

gcc/testsuite/ChangeLog

 2016-09-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/77637
+	* g++.dg/cpp0x/gen-attrs-62.C: New test.
+
 	PR middle-end/77624
 	* c-c++-common/pr77624-1.c: New test.
 	* c-c++-common/pr77624-2.c: New test.

gcc/testsuite/g++.dg/cpp0x/gen-attrs-62.C

+// PR c++/77637
+// { dg-do compile { target c++11 } }
+
+int [[...]] a;		// { dg-error "expected attribute before '...'" }
+int [[,,...]] b;	// { dg-error "expected attribute before '...'" }