Make define_singleton_method always define a public method

In very unlikely cases, it could previously define a non-public method
starting in Ruby 2.1.

Fixes [Bug #18561]

1 files changed, 11 insertions, 0 deletions

diff --git a/test/ruby/test_method.rb b/test/ruby/test_method.rb
index caf8bebd35..83e499913a 100644
--- a/test/ruby/test_method.rb
+++ b/test/ruby/test_method.rb
@@ -323,6 +323,17 @@ class TestMethod < Test::Unit::TestCase
     assert_equal(:foo, o.foo)
   end
 
+  PUBLIC_SINGLETON_TEST = Object.new
+  class << PUBLIC_SINGLETON_TEST
+    private
+    PUBLIC_SINGLETON_TEST.define_singleton_method(:dsm){}
+    def PUBLIC_SINGLETON_TEST.def; end
+  end
+  def test_define_singleton_method_public
+    assert_equal(true, PUBLIC_SINGLETON_TEST.method(:dsm).public?)
+    assert_equal(true, PUBLIC_SINGLETON_TEST.method(:def).public?)
+  end
+
   def test_define_singleton_method_no_proc
     o = Object.new
     assert_raise(ArgumentError) {