From daf118971c9a51a435fe0a230b287670fca4bf36 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Sun, 8 Apr 2018 16:40:02 -0700
Subject: [PATCH] cli_parser: undefine OpenStruct instance tap.

Undefine `tap` to allow `--tap` arguments to work as expected.
---
 Library/Homebrew/cli_parser.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Library/Homebrew/cli_parser.rb b/Library/Homebrew/cli_parser.rb
index 8a6e15abb7..a7ed26e553 100644
--- a/Library/Homebrew/cli_parser.rb
+++ b/Library/Homebrew/cli_parser.rb
@@ -11,6 +11,8 @@ module Homebrew
       def initialize(&block)
         @parser = OptionParser.new
         @parsed_args = OpenStruct.new
+        # undefine tap to allow --tap argument
+        @parsed_args.instance_eval { undef tap }
         instance_eval(&block)
       end