vm_eval.c: fix hook call

* vm_eval.c (rb_check_funcall_with_hook): also should call the
  given hook before returning Qundef when overridden respond_to?
  method returned false.  [ruby-core:73556] [Bug #12030]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53695 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 3baba6a0b7..8b6910cf3b 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1324,6 +1324,15 @@ class TestHash < Test::Unit::TestCase
     assert_equal({dug: [:foo, :bar]}, h.dig(:d, :foo, :bar))
   end
 
+  def test_dig_with_respond_to
+    bug12030 = '[ruby-core:73556] [Bug #12030]'
+    o = Object.new
+    def o.respond_to?(*args)
+      super
+    end
+    assert_raise(TypeError) {{foo: o}.dig(:foo, :foo)}
+  end
+
   def test_cmp
     h1 = {a:1, b:2}
     h2 = {a:1, b:2, c:3}