Support delegates for BasicObject

For BasicObject, bind the Kernel respond_to? instance method to the
object and call it instead of calling the method directly.

Also, use bind_call(recv, ...) for better performance.

Fixes [Bug #16127]

1 files changed, 8 insertions, 0 deletions

diff --git a/test/test_delegate.rb b/test/test_delegate.rb
index 9634681797..7f6e7c1326 100644
--- a/test/test_delegate.rb
+++ b/test/test_delegate.rb
@@ -322,4 +322,12 @@ class TestDelegateClass < Test::Unit::TestCase
       delegate.constants
     end
   end
+
+  def test_basicobject
+    o = BasicObject.new
+    def o.bar; 1; end
+    delegate = SimpleDelegator.new(o)
+    assert_equal(1, delegate.bar)
+    assert_raise(NoMethodError, /undefined method `foo' for/) { delegate.foo }
+  end
 end