(finish_enum): Handle VALUES being an ERROR_MARK.

From-SVN: r7303

gcc/c-decl.c

@@ -5642,6 +5642,9 @@ finish_enum (enumtype, values)
 
   /* Calculate the maximum value of any enumerator in this type.  */
 
+  if (values == error_mark_node)
+    minnode = maxnode = integer_zero_node;
+  else
     for (pair = values; pair; pair = TREE_CHAIN (pair))
       {
 	tree value = TREE_VALUE (pair);
@@ -5700,6 +5703,8 @@ finish_enum (enumtype, values)
   /* An enum can have some negative values; then it is signed.  */
   TREE_UNSIGNED (enumtype) = tree_int_cst_sgn (minnode) >= 0;
 
+  if (values != error_mark_node)
+    {
       /* Change the type of the enumerators to be the enum type.
 	 Formerly this was done only for enums that fit in an int,
 	 but the comment said it was done only for enums wider than int.
@@ -5718,6 +5723,7 @@ finish_enum (enumtype, values)
 	TREE_PURPOSE (pair) = DECL_NAME (TREE_PURPOSE (pair));
 
       TYPE_VALUES (enumtype) = values;
+    }
 
   /* Fix up all variant types of this enum type.  */
   for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem))