Auto-merge for PR #478 via VersionBot

Fix the message shown when docker gives a 500 error when starting a container

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file
 automatically by Versionist. DO NOT EDIT THIS FILE MANUALLY!
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## v6.0.4 - 2017-07-26
+
+* Fix the message shown when docker gives a 500 error when starting a container [Pablo Carranza Velez]
+
 ## v6.0.3 - 2017-07-25
 
 * Use a pinned build of the debian image to build base and gosuper, to avoid unnecessary rebuilds [Pablo Carranza Velez]

package.json

@@ -1,7 +1,7 @@
 {
   "name": "resin-supervisor",
   "description": "This is resin.io's Supervisor, a program that runs on IoT devices and has the task of running user Apps (which are Docker containers), and updating them as Resin's API informs it to.",
-  "version": "6.0.3",
+  "version": "6.0.4",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",

src/application.coffee

@@ -244,6 +244,12 @@ shouldMountKmod = (image) ->
 			console.error('Error getting app OS release: ', err)
 			return false
 
+isExecFormatError = (err) ->
+	message = ''
+	try
+		message = err.json.trim()
+	/exec format error$/.test(message)
+
 application.start = start = (app) ->
 	device.isResinOSv1().then (isV1) ->
 		volumes = utils.defaultVolumes(isV1)
@@ -319,7 +325,7 @@ application.start = start = (app) ->
 						alreadyStarted = true
 						return
 
-					if statusCode is '500' and err.json.trim().match(/exec format error$/)
+					if statusCode is '500' and isExecFormatError(err)
 						# Provide a friendlier error message for "exec format error"
 						device.getDeviceType()
 						.then (deviceType) ->