https://git.ruby-lang.org/ruby.git/commit/?id=e0c4cb2ea1

From e0c4cb2ea1ac648bdd0850dd1621f5e13382b760 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 28 Jun 2019 15:22:27 +0900
Subject: Define singleton method on each new objects


diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index 6d1a6ea..873f67b 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -29,6 +29,8 @@ class TestStringIO < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/stringio/test_stringio.rb#L29
       nil
     end
     assert_raise(TypeError) { StringIO.new(o) }
+
+    o = Object.new
     def o.to_str
       'str'
     end
-- 
cgit v0.10.2


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