1 files changed, 16 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 034dac570c..dc99a8c463 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -3549,4 +3549,20 @@ __END__
       end
     end
   end
+
+  def test_select_leak
+    assert_no_memory_leak([], <<-"end;", <<-"end;", rss: true, timeout: 60)
+      r, w = IO.pipe
+      rset = [r]
+      wset = [w]
+      Thread.new { IO.select(rset, wset, nil, 0) }.join
+    end;
+      20_000.times do
+        th = Thread.new { IO.select(rset, wset) }
+        Thread.pass until th.stop?
+        th.kill
+        th.join
+      end
+    end;
+  end
 end