From 198f984b92fa08069b8047cea83efa713358255a Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Wed, 8 May 2013 17:09:10 -0700
Subject: [PATCH] packer: error if UI fails

---
 packer/ui.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packer/ui.go b/packer/ui.go
index 372102b89..6a735ee39 100644
--- a/packer/ui.go
+++ b/packer/ui.go
@@ -19,9 +19,15 @@ type ReaderWriterUi struct {
 }
 
 func (rw *ReaderWriterUi) Say(format string, a ...interface{}) {
-	fmt.Fprintf(rw.Writer, format, a...)
+	_, err := fmt.Fprintf(rw.Writer, format, a...)
+	if err != nil {
+		panic(err)
+	}
 }
 
 func (rw *ReaderWriterUi) Error(format string, a ...interface{}) {
-	fmt.Fprintf(rw.Writer, format, a...)
+	_, err := fmt.Fprintf(rw.Writer, format, a...)
+	if err != nil {
+		panic(err)
+	}
 }