From 07646a71509d33a32db64daa0793d649d631fab8 Mon Sep 17 00:00:00 2001
From: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Date: Sun, 17 Apr 2016 12:01:19 -0700
Subject: [PATCH] Return runtime output on checkpoint operation errors

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
---
 runtime/container_linux.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/runtime/container_linux.go b/runtime/container_linux.go
index 25fd9a4..5bb9acb 100644
--- a/runtime/container_linux.go
+++ b/runtime/container_linux.go
@@ -133,7 +133,11 @@ func (c *container) Checkpoint(cpt Checkpoint) error {
 		add("--ext-unix-sk")
 	}
 	add(c.id)
-	return exec.Command(c.runtime, args...).Run()
+	out, err := exec.Command(c.runtime, args...).CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("%s: %s", err.Error(), string(out))
+	}
+	return err
 }
 
 func (c *container) DeleteCheckpoint(name string) error {