kazu	2016-11-22 22:59:16 +0900 (Tue, 22 Nov 2016)

  New Revision: 56874

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=56874

  Log:
    IOError does not happen
    
    * IOError does not happen even if another thread closes io
    * Use symbol proc

  Modified files:
    trunk/lib/webrick/server.rb
Index: lib/webrick/server.rb
===================================================================
--- lib/webrick/server.rb	(revision 56873)
+++ lib/webrick/server.rb	(revision 56874)
@@ -327,12 +327,7 @@ module WEBrick https://github.com/ruby/ruby/blob/trunk/lib/webrick/server.rb#L327
     def cleanup_shutdown_pipe(shutdown_pipe)
       @shutdown_pipe = nil
       return if !shutdown_pipe
-      shutdown_pipe.each {|io|
-        begin
-          io.close
-        rescue IOError # another thread closed io.
-        end
-      }
+      shutdown_pipe.each(&:close)
     end
 
     def alarm_shutdown_pipe

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