From 1be52fb3045ae473e9ea48c3f0c38fd1b2c584f1 Mon Sep 17 00:00:00 2001
From: Liz Rice <liz@lizrice.com>
Date: Fri, 23 Jun 2017 09:40:53 +0100
Subject: [PATCH] Add missing error output if JSON output can't be emitted

---
 cmd/common.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cmd/common.go b/cmd/common.go
index 1e35449..33ded89 100644
--- a/cmd/common.go
+++ b/cmd/common.go
@@ -112,6 +112,8 @@ func runChecks(t check.NodeType) {
 	if jsonFmt {
 		out, err := controls.JSON()
 		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to output in JSON format: %v\n", err)
+			os.Exit(1)
 		}
 
 		fmt.Println(string(out))