1 files changed, 9 insertions, 0 deletions
diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index c40bf43e25..cc266a4c4a 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -195,4 +195,13 @@ class TestFile < Test::Unit::TestCase
       puts '#{bug5596}'
     EOS
   end
+
+  def test_chmod_m17n
+    bug5671 = '[ruby-dev:44898]'
+    Dir.mktmpdir('test-file-chmod-m17n-') do |tmpdir|
+      file = File.join(tmpdir, "\u3042")
+      File.open(file, 'w'){}
+      assert_equal(File.chmod(0666, file), 1, bug5671)
+    end
+  end
 end