From 42c9ecd6654e65ed39f1cf20ccc8e24007254c3a Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Mon, 28 Oct 2013 10:50:02 +0000
Subject: [PATCH] Bottle: handle legacy bottle OS tags.

Otherwise :mountainlion, :snowleopard in the history for CMake breaks
bottle_filenames from versions for new CMake bottles.
---
 Library/Homebrew/software_spec.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/software_spec.rb b/Library/Homebrew/software_spec.rb
index 3d0664b7d6..83c6a2d5b3 100644
--- a/Library/Homebrew/software_spec.rb
+++ b/Library/Homebrew/software_spec.rb
@@ -120,7 +120,7 @@ class Bottle < SoftwareSpec
       checksum_os_versions = send checksum_type
       next unless checksum_os_versions
       os_versions = checksum_os_versions.keys
-      os_versions.map! {|osx| MacOS::Version.from_symbol osx }
+      os_versions.map! {|osx| MacOS::Version.from_symbol osx rescue nil }
       os_versions.sort.reverse.each do |os_version|
         osx = os_version.to_sym
         checksum = checksum_os_versions[osx]