From aff3743c129602d7757d2ffd690afcd42cc9cdc3 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 28 Apr 2021 17:45:19 +0900
Subject: array.rb: `Array#uniq` to return always `Array`.

Even called for subclass of `Array`, according to new Ruby3.0 behavior.
Other methods of `Array` behave as Ruby3.0 from the first hand.
---
 mrbgems/mruby-array-ext/mrblib/array.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mrbgems/mruby-array-ext/mrblib/array.rb b/mrbgems/mruby-array-ext/mrblib/array.rb
index becfcb3ca..ecd09aa6e 100644
--- a/mrbgems/mruby-array-ext/mrblib/array.rb
+++ b/mrbgems/mruby-array-ext/mrblib/array.rb
@@ -51,7 +51,7 @@ class Array
   #    b.uniq { |s| s.first } # => [["student", "sam"], ["teacher", "matz"]]
   #
   def uniq(&block)
-    ary = self.dup
+    ary = self[0..-1]
     ary.uniq!(&block)
     ary
   end
-- 
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