From e27574b27bf6ce11ce0dc5a139c09b228c672480 Mon Sep 17 00:00:00 2001
From: Jack Nagel <jacknagel@gmail.com>
Date: Wed, 9 Oct 2013 21:41:14 -0500
Subject: [PATCH] SubversionDownloadStrategy: stop mutating revisions hash

---
 Library/Homebrew/download_strategy.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/download_strategy.rb b/Library/Homebrew/download_strategy.rb
index c2b1096aaf..691ed87365 100644
--- a/Library/Homebrew/download_strategy.rb
+++ b/Library/Homebrew/download_strategy.rb
@@ -336,7 +336,7 @@ class SubversionDownloadStrategy < AbstractDownloadStrategy
       fetch_repo @co, @url, @ref
     when :revisions
       # nil is OK for main_revision, as fetch_repo will then get latest
-      main_revision = @ref.delete :trunk
+      main_revision = @ref[:trunk]
       fetch_repo @co, @url, main_revision, true
 
       get_externals do |external_name, external_url|