merge revision(s) 53810: [Backport #12044]

	* net/ftp.rb: add NullSocket#closed? to fix closing not opened
	  connection.  [Fix GH-1232]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@54330 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/net/ftp.rb b/lib/net/ftp.rb
index f513ca6ee8..5b63764625 100644
--- a/lib/net/ftp.rb
+++ b/lib/net/ftp.rb
@@ -1070,6 +1070,10 @@ module Net
       def read_timeout=(sec)
       end
 
+      def closed?
+        true
+      end
+
       def close
       end