From 617f2d1576c6cd0d97bb8074515c27444aa6fff0 Mon Sep 17 00:00:00 2001
From: Aviv Keller <me@aviv.sh>
Date: Sun, 26 Jul 2026 05:17:40 +0000
Subject: [PATCH] test_runner: convert to uint during deserialization

Signed-off-by: Aviv Keller <me@aviv.sh>
PR-URL: https://github.com/nodejs/node/pull/64706
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
---
 lib/internal/test_runner/runner.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/internal/test_runner/runner.js b/lib/internal/test_runner/runner.js
index e08e638cf9bb..e6d82bf431df 100644
--- a/lib/internal/test_runner/runner.js
+++ b/lib/internal/test_runner/runner.js
@@ -331,12 +331,12 @@ class FileTest extends Test {
     while (bufferHead?.length >= kSerializedSizeHeader) {
       // We call `readUInt32BE` manually here, because this is faster than first converting
       // it to a buffer and using `readUInt32BE` on that.
-      const fullMessageSize = (
+      const fullMessageSize = ((
         bufferHead[kV8HeaderLength] << 24 |
         bufferHead[kV8HeaderLength + 1] << 16 |
         bufferHead[kV8HeaderLength + 2] << 8 |
         bufferHead[kV8HeaderLength + 3]
-      ) + kSerializedSizeHeader;
+      ) >>> 0) + kSerializedSizeHeader;
 
       if (this.#rawBufferSize < fullMessageSize) break;