1 files changed, 12 insertions, 0 deletions
diff --git a/test/ruby/test_iterator.rb b/test/ruby/test_iterator.rb
index 638916309e..2cd48b29a4 100644
--- a/test/ruby/test_iterator.rb
+++ b/test/ruby/test_iterator.rb
@@ -462,4 +462,16 @@ class TestIterator < Test::Unit::TestCase
     assert_equal(ok, result)
     return
   end
+
+  class IterString < ::String
+    def ===(other)
+      super if !block_given?
+    end
+  end
+
+  # Check that the block passed to an iterator
+  # does not get propagated inappropriately
+  def test_block_given_within_iterator
+    assert_equal(["b"], ["a", "b", "c"].grep(IterString.new("b")) {|s| s})
+  end
 end