From f79b9d98592bcc307ace9c9a2441b04eb175a1c2 Mon Sep 17 00:00:00 2001
From: Amaan Qureshi <amaanq12@gmail.com>
Date: Thu, 11 Apr 2024 21:23:17 -0400
Subject: [PATCH] fix(scanner): only call memcpy if `length` is greater than 0

---
 src/scanner.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/scanner.c b/src/scanner.c
index 32b489327..f8d721c67 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -137,7 +137,9 @@ void tree_sitter_cpp_external_scanner_deserialize(void *payload, const char *buf
 
     Scanner *scanner = (Scanner *)payload;
     scanner->delimiter_length = length / sizeof(wchar_t);
-    memcpy(&scanner->delimiter[0], buffer, length);
+    if (length > 0) {
+        memcpy(&scanner->delimiter[0], buffer, length);
+    }
 }
 
 void tree_sitter_cpp_external_scanner_destroy(void *payload) {