https://golang.org/pkg/sync/#RWMutex

Holds that this prohibits recursive read locks but why would it?
I understand that deadlocks can happen in case write locks are held in
between the read locks
but why can't a goroutine issue several RLock calls?

It does actually work in the playground.
https://play.golang.org/p/nOehJaeikxA
Is this simply a recommendation or should the docs be updated to clarify
what this means?

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