From ffd9113cc52bd4e56770c14c8c6f2c049dd664f1 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Fri, 26 Sep 2025 19:35:34 +0200
Subject: [PATCH] Fix Valgrind warning

Zero-terminate the result buffer after number conversion.

Fixes: https://github.com/quickjs-ng/quickjs/issues/1162
---
 quickjs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/quickjs.c b/quickjs.c
index f63b7df66..40c5d5589 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -3521,7 +3521,10 @@ static JSAtom js_atom_concat_str(JSContext *ctx, JSAtom name, const char *str1)
 static JSAtom js_atom_concat_num(JSContext *ctx, JSAtom name, uint32_t n)
 {
     char buf[16];
-    u32toa(buf, n);
+    size_t len;
+
+    len = u32toa(buf, n);
+    buf[len] = '\0';
     return js_atom_concat_str(ctx, name, buf);
 }