From 298b54c9ec5fffff7f2e88489c8d663e689803f3 Mon Sep 17 00:00:00 2001
From: ValKmjolnir <lhk101lhk101@qq.com>
Date: Wed, 6 Sep 2023 19:29:59 +0800
Subject: [PATCH] :bug: fix out of bound bug

---
 src/nasal_parse.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/nasal_parse.cpp b/src/nasal_parse.cpp
index cd968e3..e1aa64b 100644
--- a/src/nasal_parse.cpp
+++ b/src/nasal_parse.cpp
@@ -189,7 +189,10 @@ bool parse::need_semi_check(expr* node) {
 }
 
 void parse::update_location(expr* node) {
-    node->update_location(toks[ptr].loc);
+    if (!ptr) {
+        return;
+    }
+    node->update_location(toks[ptr-1].loc);
 }
 
 null_expr* parse::null() {