From 397faf6172120b329906c0b19f5af762fa457944 Mon Sep 17 00:00:00 2001
From: Duncan Paterson <duncan@brainnwave.com>
Date: Tue, 25 Apr 2017 15:05:09 +0100
Subject: [PATCH] Fixes --exit-code-from

 - tried to find the length and array index of a filter object

Signed-off-by: Duncan Paterson <duncan@brainnwave.com>
---
 compose/cli/main.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compose/cli/main.py b/compose/cli/main.py
index 53ff84f45..9b40599cf 100644
--- a/compose/cli/main.py
+++ b/compose/cli/main.py
@@ -941,9 +941,9 @@ class TopLevelCommand(object):
 
                 exit_code = 0
                 if exit_value_from:
-                    candidates = filter(
+                    candidates = list(filter(
                         lambda c: c.service == exit_value_from,
-                        attached_containers)
+                        attached_containers))
                     if not candidates:
                         log.error(
                             'No containers matching the spec "{0}" '