From 7b56353d97d38719c8dfa0255c9ca46dacd7ffad Mon Sep 17 00:00:00 2001
From: Fable Phippen <fable@stripe.com>
Date: Mon, 26 Feb 2024 14:24:22 -0500
Subject: Add a failing test for https://bugs.ruby-lang.org/issues/20305.

This bug demonstrates the issue I reported. It passes on commit
https://github.com/ruby/ruby/commit/114e71d06280f9c57b9859ee4405ae89a989ddb6
but does not pass on commit (the immediate child of the above commit)
https://github.com/ruby/ruby/commit/1d2d25dcadda0764f303183ac091d0c87b432566
---
 test/ruby/test_string.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 149c128ed4..8b70bbb46d 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1130,6 +1130,11 @@ CODE
     end;
   end
 
+  def test_byteslice_grapheme_clusters
+    string = "안녕"
+    assert_equal(["안"], string.byteslice(0,4).grapheme_clusters)
+  end
+
   def test_each_line
     verbose, $VERBOSE = $VERBOSE, nil
 
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