From f8b3a2e93cb998e181457f3fecd30066454bbc66 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Wed, 1 Nov 2023 04:24:42 +0100
Subject: [PATCH] Fix sloppy mode arguments uninitialized value use

MemorySanitizer complained about uninitialized reads in
the indexed property code path in JS_GetPropertyValue()
with JS_CLASS_MAPPED_ARGUMENTS objects.
---
 quickjs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/quickjs.c b/quickjs.c
index 3696011c..d662eb35 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -15005,6 +15005,8 @@ static JSValue js_build_mapped_arguments(JSContext *ctx, int argc,
     if (JS_IsException(val))
         return val;
     p = JS_VALUE_GET_OBJ(val);
+    p->u.array.u.values = NULL;
+    p->u.array.count = 0;
 
     /* add the length field (cannot fail) */
     pr = add_property(ctx, p, JS_ATOM_length,