code review 6002053: net: fix race between Close and Read

src/pkg/net/unixsock_posix.go

Index: src/pkg/net/unixsock_posix.go
===================================================================
--- a/src/pkg/net/unixsock_posix.go
+++ b/src/pkg/net/unixsock_posix.go
@@ -141,9 +141,7 @@
 	if !c.ok() {
 		return syscall.EINVAL
 	}
-	err := c.fd.Close()
-	c.fd = nil
-	return err
+	return c.fd.Close()
 }
 
 // LocalAddr returns the local network address, a *UnixAddr.