From b0f8931d26e6e128adaddcb3a76c440ab83d918a Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Wed, 11 Mar 2020 09:51:33 -0700
Subject: [PATCH] wgengine/magicsock: make a test signature a bit more explicit

---
 wgengine/magicsock/magicsock_test.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wgengine/magicsock/magicsock_test.go b/wgengine/magicsock/magicsock_test.go
index 188b79002..4782c3933 100644
--- a/wgengine/magicsock/magicsock_test.go
+++ b/wgengine/magicsock/magicsock_test.go
@@ -166,8 +166,8 @@ func serveSTUN(t *testing.T) (addr string, cleanupFn func()) {
 	}
 }
 
-func runSTUN(t *testing.T, pc net.PacketConn, stats *stunStats, done chan struct{}) {
-	defer func() { done <- struct{}{} }()
+func runSTUN(t *testing.T, pc net.PacketConn, stats *stunStats, done chan<- struct{}) {
+	defer close(done)
 
 	var buf [64 << 10]byte
 	for {