From 0b9e601e70bea97bc458f92c7c420698c487e0bb Mon Sep 17 00:00:00 2001
From: Tommy Pauly <tpauly@apple.com>
Date: Mon, 3 Aug 2026 15:10:19 -0700
Subject: [PATCH] Use closeMutex for setting closeWithErrorHandler

---
 Sources/SwiftNetwork/Protocols/QUICConnectionProtocol.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/SwiftNetwork/Protocols/QUICConnectionProtocol.swift b/Sources/SwiftNetwork/Protocols/QUICConnectionProtocol.swift
index 23f84b8..03993cc 100644
--- a/Sources/SwiftNetwork/Protocols/QUICConnectionProtocol.swift
+++ b/Sources/SwiftNetwork/Protocols/QUICConnectionProtocol.swift
@@ -1006,7 +1006,7 @@ public struct QUICConnectionProtocol: NetworkProtocol {
         }
 
         func setCloseWithError(handler: @escaping QUICMetadataSetterHandler) {
-            mutex.withLock { _ in
+            closeMutex.withLock { _ in
                 self.closeWithErrorHandler = handler
             }
         }