1 files changed, 7 insertions, 0 deletions
diff --git a/test/ruby/test_lambda.rb b/test/ruby/test_lambda.rb
index 02bb26939d..ae12c6d609 100644
--- a/test/ruby/test_lambda.rb
+++ b/test/ruby/test_lambda.rb
@@ -63,4 +63,11 @@ class TestLambdaParameters < Test::Unit::TestCase
   def foo
     assert_equal(nil, ->(&b){ b }.call)
   end
+
+  def test_in_basic_object
+    bug5966 = '[ruby-core:42349]'
+    called = false
+    BasicObject.new.instance_eval {->() {called = true}.()}
+    assert_equal(true, called, bug5966)
+  end
 end