merge revision(s) 59613: [Backport #13817]

	vm_method.c: alias warning at refined method

	* vm_method.c (rb_method_entry_make): suppress a warning at
	  refined method which will not be redefined.
	  [ruby-core:82385] [Bug #13817]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@59819 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 17 insertions, 0 deletions

diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 82bdb49659..c3b4913d06 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -1900,6 +1900,23 @@ class TestRefinement < Test::Unit::TestCase
     end
   end
 
+  def test_refined_method_alias_warning
+    c = Class.new do
+      def t; :t end
+      def f; :f end
+    end
+    Module.new do
+      refine(c) do
+        alias foo t
+      end
+    end
+    assert_warning('', '[ruby-core:82385] [Bug #13817] refined method is not redefined') do
+      c.class_eval do
+        alias foo f
+      end
+    end
+  end
+
   private
 
   def eval_using(mod, s)