From 6d075a3b17e761d77e35d2a68dd4bb3d6a067776 Mon Sep 17 00:00:00 2001
From: Max Howell <max@methylblue.com>
Date: Mon, 5 Sep 2011 18:54:07 +0100
Subject: [PATCH] Check even more carefully for xcode_version

Refs Homebrew/homebrew#7236, though honestly I just think @dsarch hasn't updated.
---
 Library/Homebrew/utils.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index 4fb84d8f47..cc146222b9 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -299,6 +299,7 @@ module MacOS extend self
     @xcode_version ||= begin
       raise unless system "/usr/bin/which -s xcodebuild"
       `xcodebuild -version 2>&1` =~ /Xcode (\d(\.\d)*)/
+      raise if $1.nil?
       $1
     rescue
       # for people who don't have xcodebuild installed due to using