lib/async/channel.rb in grumlin-0.6.2 vs lib/async/channel.rb in grumlin-0.7.0

@@ -30,10 +30,10 @@
 
       @queue << [:exception, exception]
     end
 
     def close
-      raise(ChannelClosedError, "Cannot close a closed channel") if closed?
+      return if closed?
 
       @queue << [:close]
       @closed = true
     end