From ed1cbca81fcf20bc933a81bb4aa7281b34a96e55 Mon Sep 17 00:00:00 2001
From: Michael Hoisie <hoisie@gmail.com>
Date: Tue, 4 Jan 2011 11:55:13 -0500
Subject: [PATCH] net: fix close of Listener

Fixes #1375.

R=rsc, r
CC=golang-dev
https://golang.org/cl/3731048
---
 src/pkg/net/fd.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/pkg/net/fd.go b/src/pkg/net/fd.go
index b2e24f5986..5adaf1df3c 100644
--- a/src/pkg/net/fd.go
+++ b/src/pkg/net/fd.go
@@ -567,6 +567,10 @@ func (fd *netFD) accept(toAddr func(syscall.Sockaddr) Addr) (nfd *netFD, err os.
 	var s, e int
 	var sa syscall.Sockaddr
 	for {
+		if fd.closing {
+			syscall.ForkLock.RUnlock()
+			return nil, os.EINVAL
+		}
 		s, sa, e = syscall.Accept(fd.sysfd)
 		if e != syscall.EAGAIN {
 			break
-- 
2.50.0