From 3a20e4e15d27ab0061e5ffb427baf7162de9add9 Mon Sep 17 00:00:00 2001
From: Victor Vieux <victor.vieux@dotcloud.com>
Date: Mon, 8 Jul 2013 18:19:12 +0000
Subject: [PATCH] add if to prevent crash

---
 commands.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/commands.go b/commands.go
index f62f964621..0bd7965f7f 100644
--- a/commands.go
+++ b/commands.go
@@ -1516,6 +1516,9 @@ func (cli *DockerCli) getTtySize() (int, int) {
 	ws, err := term.GetWinsize(cli.terminalFd)
 	if err != nil {
 		utils.Debugf("Error getting size: %s", err)
+		if ws == nil {
+			return 0, 0
+		}
 	}
 	return int(ws.Height), int(ws.Width)
 }