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_3@54377 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Mar 29 16:25:27 2016  Anthony Dmitriyev  <antstorm@gmail.com>
+
+	* net/ftp.rb: add NullSocket#closed? to fix closing not opened
+	  connection.  [Fix GH-1232]
+
 Tue Mar 29 16:12:08 2016  Koichi ITO  <koic.ito@gmail.com>
 
 	* variable.c: Added documentation about order of `Module#constants`

lib/net/ftp.rb

@@ -1270,6 +1270,10 @@ module Net
       def read_timeout=(sec)
       end
 
+      def closed?
+        true
+      end
+
       def close
       end
 

test/net/ftp/test_ftp.rb

@@ -29,6 +29,14 @@ class FTPTest < Test::Unit::TestCase
     end
   end
 
+  def test_closed_when_not_connected
+    ftp = Net::FTP.new
+    assert_equal(true, ftp.closed?)
+    assert_nothing_raised(Net::FTPConnectionError) do
+      ftp.close
+    end
+  end
+
   def test_connect_fail
     server = create_ftp_server { |sock|
       sock.print("421 Service not available, closing control connection.\r\n")

version.h

@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.0"
 #define RUBY_RELEASE_DATE "2016-03-29"
-#define RUBY_PATCHLEVEL 34
+#define RUBY_PATCHLEVEL 35
 
 #define RUBY_RELEASE_YEAR 2016
 #define RUBY_RELEASE_MONTH 3