From 579eaaabc5d794ebde8b1979c9de256ca089c277 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Sat, 20 Jul 2013 19:51:25 -0700
Subject: [PATCH] builder/amazon/common: panic if SSHPot is 0

---
 builder/amazon/common/step_security_group.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/builder/amazon/common/step_security_group.go b/builder/amazon/common/step_security_group.go
index 5f3be3df9..e5743f202 100644
--- a/builder/amazon/common/step_security_group.go
+++ b/builder/amazon/common/step_security_group.go
@@ -27,6 +27,10 @@ func (s *StepSecurityGroup) Run(state map[string]interface{}) multistep.StepActi
 		return multistep.ActionContinue
 	}
 
+	if s.SSHPort == 0 {
+		panic("SSHPort must be set to a non-zero value.")
+	}
+
 	// Create the group
 	ui.Say("Creating temporary security group for this instance...")
 	groupName := fmt.Sprintf("packer %s", hex.EncodeToString(identifier.NewUUID().Raw()))