From 3564350290ad8c035a81838271a5bb3defb454d0 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@ruby-lang.org>
Date: Fri, 3 Jan 2020 23:51:21 +0900
Subject: [PATCH 1/2] Add a shim for Proc#ruby2_keywords

---
 lib/ruby2_keywords.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/ruby2_keywords.rb b/lib/ruby2_keywords.rb
index 7516af3..f57ec6b 100644
--- a/lib/ruby2_keywords.rb
+++ b/lib/ruby2_keywords.rb
@@ -13,3 +13,9 @@ def main.ruby2_keywords(*)
     # nil
   end
 end
+
+class Proc
+  def ruby2_keywords
+    self
+  end
+end

From 758e0877f940c7e467d8956d8345a41c2c169dd5 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@ruby-lang.org>
Date: Mon, 6 Jan 2020 15:27:08 +0900
Subject: [PATCH 2/2] Add a guard for Proc#ruby2_keywords

---
 lib/ruby2_keywords.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/ruby2_keywords.rb b/lib/ruby2_keywords.rb
index f57ec6b..855c9cb 100644
--- a/lib/ruby2_keywords.rb
+++ b/lib/ruby2_keywords.rb
@@ -15,7 +15,9 @@ def main.ruby2_keywords(*)
 end
 
 class Proc
-  def ruby2_keywords
-    self
+  unless method_defined?(:ruby2_keywords)
+    def ruby2_keywords
+      self
+    end
   end
 end