From 2b9c6e1a8a1aa94ed8d300368abb4247cfb24d87 Mon Sep 17 00:00:00 2001
From: mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 8 Jan 2019 04:37:40 +0000
Subject: range.c (range_last): disable optimization when each is redefined

Do not use the optimized version of Range#last when Range#each is
redefined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66749 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_range.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index 8c3eb08aa7..65f3a8974d 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -450,6 +450,18 @@ class TestRange < Test::Unit::TestCase
     assert_raise(ArgumentError) { (0..10).last(-1) }
   end
 
+  def test_last_with_redefine_each
+    assert_in_out_err([], <<-'end;', ['true'], [])
+      class Range
+        remove_method :each
+        def each(&b)
+          [1, 2, 3, 4, 5].each(&b)
+        end
+      end
+      puts [3, 4, 5] == (1..10).last(3)
+    end;
+  end
+
   def test_to_s
     assert_equal("0..1", (0..1).to_s)
     assert_equal("0...1", (0...1).to_s)
-- 
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