1 files changed, 9 insertions, 0 deletions
diff --git a/test/ruby/test_class.rb b/test/ruby/test_class.rb
index 8d9fde144e..5086e60398 100644
--- a/test/ruby/test_class.rb
+++ b/test/ruby/test_class.rb
@@ -809,4 +809,13 @@ PREP
 3_000_000.times(&code)
 CODE
   end
+
+  def test_instance_freeze_dont_freeze_the_class_bug_19164
+    klass = Class.new
+    klass.prepend(Module.new)
+
+    klass.new.freeze
+    klass.define_method(:bar) {}
+    assert_equal klass, klass.remove_method(:bar), '[Bug #19164]'
+  end
 end