Close dup'ed fd after using

CHANGELOG.md

@@ -17,6 +17,7 @@
     (Adam Prescott) [Issue #493]
 *   Ensure process exits with correct status code and $! is propagated.
     (Micah Geisel) [Issue #497]
+*   Close dup'ed fd after using (Dmitry Vorotilin) [Issue #446, #529, #528]
 
 ### 1.5.0 ###
 

lib/capybara/poltergeist/client.rb

@@ -99,13 +99,13 @@ module Capybara::Poltergeist
     # it works with JRuby but I've experienced strange mistakes on Rubinius.
     def redirect_stdout
       prev = STDOUT.dup
-      prev.autoclose = false
       $stdout = @write_io
       STDOUT.reopen(@write_io)
       yield
     ensure
       STDOUT.reopen(prev)
       $stdout = STDOUT
+      prev.close
     end
 
     def kill_phantomjs