1 files changed, 11 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 333b610bc5..4aa119f8fd 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1108,6 +1108,17 @@ CODE
     assert_equal("C", res[2])
   end
 
+  def test_grapheme_clusters_memory_leak
+    assert_no_memory_leak([], "", "#{<<~"begin;"}\n#{<<~'end;'}", "[Bug #todo]", rss: true)
+    begin;
+      str = "hello world".encode(Encoding::UTF_32LE)
+
+      10_000.times do
+        str.grapheme_clusters
+      end
+    end;
+  end
+
   def test_each_line
     verbose, $VERBOSE = $VERBOSE, nil