merge revision(s) 85b5d4c8bf4cdcba4f1af65f2bc0c8ac716cb795: [Backport #17509]

	Revert "[Bug #11213] let defined?(super) call respond_to_missing?"

	This reverts commit fac2498e0299f13dffe4f09a7dd7657fb49bf643 for
	now, due to [Bug #17509], the breakage in the case `super` is
	called in `respond_to?`.
	---
	 internal/vm.h             |  2 +-
	 test/ruby/test_defined.rb | 33 ---------------------------------
	 vm_insnhelper.c           |  4 ++--
	 vm_method.c               | 12 +++++++-----
	 4 files changed, 10 insertions(+), 41 deletions(-)

1 files changed, 0 insertions, 33 deletions

diff --git a/test/ruby/test_defined.rb b/test/ruby/test_defined.rb
index 87f02055ab..b22db700da 100644
--- a/test/ruby/test_defined.rb
+++ b/test/ruby/test_defined.rb
@@ -302,39 +302,6 @@ class TestDefined < Test::Unit::TestCase
     assert_nil(defined?(TestDefined::Object))
   end
 
-  def test_super_with_method_missing
-    c0 = EnvUtil.labeled_class("C0") do
-      attr_reader :calls
-
-      def initialize
-        @calls = []
-      end
-
-      def method_missing(*args)
-        @calls << [:method_missing, *args]
-      end
-
-      def respond_to_missing?(*args)
-        @calls << [:respond_to_missing?, *args]
-        true
-      end
-    end
-
-    c1 = EnvUtil.labeled_class("C1", c0) do
-      def foo
-        super
-        defined?(super)
-      end
-    end
-
-    c = c1.new
-    assert_not_nil(c.foo)
-    assert_equal([
-                   [:method_missing, :foo],
-                   [:respond_to_missing?, :foo, true],
-                 ], c.calls)
-  end
-
   class RefinedClass
   end