From 9950bb9b7ce41c8463cc7e6342f9c13e8c36a43c Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Thu, 9 May 2019 14:29:31 +0100
Subject: [PATCH] about: fix crash if backend returns a nil usage

---
 cmd/about/about.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmd/about/about.go b/cmd/about/about.go
index 81b7493f1..4b29afa8b 100644
--- a/cmd/about/about.go
+++ b/cmd/about/about.go
@@ -95,6 +95,9 @@ Use the --json flag for a computer readable output, eg
 			if err != nil {
 				return errors.Wrap(err, "About call failed")
 			}
+			if u == nil {
+				return errors.New("nil usage returned")
+			}
 			if jsonOutput {
 				out := json.NewEncoder(os.Stdout)
 				out.SetIndent("", "\t")