noCopy implements sync.Locker #1216
                
     Merged
            
            
          
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Description
noCopy is used by
-copylockschecker fromgo vet.see golang/go#8005 (comment) for details.
but it doesn't work from Go 1.11, because of golang/go@c2eba53 and golang/go#26165
-copylocknow works with structs that implement sync.Locker.So, noCopy should implement sync.Locker.
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