--- /tmp/c-parse.in.orig	2002-10-16 13:20:51.000000000 +0200
+++ c-parse.in	2002-10-16 13:17:58.000000000 +0200
@@ -2232,6 +2232,18 @@
 	  c99_block_lineno_labeled_stmt WHILE
 		{ $$ = $<ttype>2;
 		  RECHAIN_STMTS ($$, DO_BODY ($$)); }
+	|
+	  DO error WHILE
+		{ stmt_count++;
+		  compstmt_count++;
+		  $<ttype>$
+		    = add_stmt (build_stmt (DO_STMT, NULL_TREE,
+					    NULL_TREE));
+		  /* In the event that a parse error prevents
+		     parsing the complete do-statement, set the
+		     condition now.  Otherwise, we can get crashes at
+		     RTL-generation time.  */
+		  DO_COND ($<ttype>$) = error_mark_node; }
 	;
 
 /* The forced readahead in here is because we might be at the end of a