1 files changed, 49 insertions, 0 deletions
diff --git a/test/ruby/test_super.rb b/test/ruby/test_super.rb
index d94f4679d3..ce78e66c52 100644
--- a/test/ruby/test_super.rb
+++ b/test/ruby/test_super.rb
@@ -521,6 +521,55 @@ class TestSuper < Test::Unit::TestCase
     assert_equal(%w[B A], result, bug9721)
   end
 
+  # [Bug #18329]
+  def test_super_missing_prepended_module
+    a = Module.new do
+      def probe(*methods)
+        prepend(probing_module(methods))
+      end
+
+      def probing_module(methods)
+        Module.new do
+          methods.each do |method|
+            define_method(method) do |*args, **kwargs, &block|
+              super(*args, **kwargs, &block)
+            end
+          end
+        end
+      end
+    end
+
+    b = Class.new do
+      extend a
+
+      probe :danger!, :missing
+
+      def danger!; end
+    end
+
+    o = b.new
+    o.danger!
+    begin
+      original_gc_stress = GC.stress
+      GC.stress = true
+      2.times { o.missing rescue NoMethodError }
+    ensure
+      GC.stress = original_gc_stress
+    end
+  end
+
+  def test_zsuper_kw_splat_not_mutable
+    extend(Module.new{def a(**k) k[:a] = 1 end})
+    extend(Module.new do
+      def a(**k)
+        before = k.dup
+        super
+        [before, k]
+      end
+    end)
+    assert_equal(*a)
+  end
+
   def test_from_eval
     bug10263 = '[ruby-core:65122] [Bug #10263a]'
     a = Class.new do