From 3a60629a6d1aaf2962bd118994246463412ffbff Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Tue, 27 Nov 2018 17:04:47 -0800
Subject: [PATCH] net: use .invalid for an invalid domain name

Fixes #25370

Change-Id: I12da0cc17f433ca12c85fb986d65ac9ecb2c3f20
Reviewed-on: https://go-review.googlesource.com/c/151359
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---
 src/net/lookup_test.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/net/lookup_test.go b/src/net/lookup_test.go
index 65daa76467d..35b2a635b2c 100644
--- a/src/net/lookup_test.go
+++ b/src/net/lookup_test.go
@@ -925,8 +925,8 @@ func TestLookupHostCancel(t *testing.T) {
 
 	const (
 		google        = "www.google.com"
-		invalidDomain = "nonexistentdomain.golang.org"
-		n             = 600 // this needs to be larger than threadLimit size
+		invalidDomain = "invalid.invalid" // RFC 2606 reserves .invalid
+		n             = 600               // this needs to be larger than threadLimit size
 	)
 
 	_, err := LookupHost(google)