From a4cb63665812384376e7730fb7c394b6a38c57f8 Mon Sep 17 00:00:00 2001
From: mlugg <mlugg@mlugg.co.uk>
Date: Tue, 26 Aug 2025 09:49:55 +0100
Subject: [PATCH] std.Build.WebServer: fix race

Just a typo: I wasn't actually using the duped message, so the message I
sent could be freed in this interval.
---
 lib/std/Build/WebServer.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/Build/WebServer.zig b/lib/std/Build/WebServer.zig
index 780e249323..451f4b9d34 100644
--- a/lib/std/Build/WebServer.zig
+++ b/lib/std/Build/WebServer.zig
@@ -323,7 +323,7 @@ fn serveWebSocket(ws: *WebServer, sock: *http.Server.WebSocket) !noreturn {
                 // Temporarily unlock, then re-lock after the message is sent.
                 ws.time_report_mutex.unlock();
                 defer ws.time_report_mutex.lock();
-                try sock.writeMessage(msg, .binary);
+                try sock.writeMessage(owned_msg, .binary);
             }
         }