No respond_to? as if the default definition

* vm_method.c (vm_respond_to): try method_missing if respond_to?
  is undefined, as if it is the default definition.
  [ruby-core:75377] [Bug #12353]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55500 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/test/ruby/test_marshal.rb b/test/ruby/test_marshal.rb
index 8bfca5561f..d21ab66ffd 100644
--- a/test/ruby/test_marshal.rb
+++ b/test/ruby/test_marshal.rb
@@ -737,4 +737,24 @@ class TestMarshal < Test::Unit::TestCase
       end
     RUBY
   end
+
+  MethodMissingWithoutRespondTo = Struct.new(:wrapped_object) do
+    undef respond_to?
+    def method_missing(*args, &block)
+      wrapped_object.public_send(*args, &block)
+    end
+    def respond_to_missing?(name, private = false)
+      wrapped_object.respond_to?(name, false)
+    end
+  end
+
+  def test_method_missing_without_respond_to
+    bug12353 = "[ruby-core:75377] [Bug #12353]: try method_missing if" \
+               " respond_to? is undefined"
+    obj = MethodMissingWithoutRespondTo.new("foo")
+    dump = assert_nothing_raised(NoMethodError, bug12353) do
+      Marshal.dump(obj)
+    end
+    assert_equal(obj, Marshal.load(dump))
+  end
 end