From fff52bfbba03991082931ebcecd183849d1acd55 Mon Sep 17 00:00:00 2001
From: Peter Waller <peter@scraperwiki.com>
Date: Mon, 2 Jun 2014 19:35:13 +0100
Subject: [PATCH] Check ps.Start() error

This doesn't usually happen unless the shell is broken or unavailable.

It's nice though to have a program which shows an error message rather
than quitting silently. The test to see if this is working is to modify
the shell in `unix.go` to something which doesn't exist.
---
 start.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/start.go b/start.go
index 0a5a953..4fe38b1 100644
--- a/start.go
+++ b/start.go
@@ -126,7 +126,12 @@ func (f *Forego) startProcess(idx, procNum int, proc ProcfileEntry, env Env, of
 
 	finished := make(chan struct{}) // closed on process exit
 
-	ps.Start()
+	err = ps.Start()
+	if err != nil {
+		f.teardown.Fall()
+		of.SystemOutput(fmt.Sprint("Failed to start ", procName, ": ", err))
+		return
+	}
 
 	f.wg.Add(1)
 	go func() {