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-rw-r--r--Library/Homebrew/extend/ENV/super.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 57d07c637..1afc94a0d 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -28,6 +28,7 @@ module Superenv
# done on the singleton class, because in MRI all ENV methods are defined
# on its singleton class, precluding the use of extend.
class << base
+ alias_method :"old_[]", :[]
def [] key
if has_key? key
fetch(key)