From a05cc73c7519d7802c222921bf3b3c5b045b17f1 Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Fri, 4 Apr 2014 05:09:45 +0800
Subject: add scope

---
 main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'main.c')

diff --git a/main.c b/main.c
index 17a10ad..ff70bf9 100644
--- a/main.c
+++ b/main.c
@@ -44,7 +44,11 @@ void print_ast() {
 
 void print_sem() {
     yyparse();
-    semantics_check(ast_root);
+    if (ast_root)
+    {
+        semantics_check(ast_root);
+    }
+    else exit(1);
 }
 
 void print_help() {
-- 
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