@darwin: would you suggest that you shouldn’t allow closing on a timeout channel, or is it just something that you need to be aware of?

I think timeout should be non-optimized, by default, and enabling coalescing of channels should be properly documented as potentially unsafe. Alternative step would be some guard code as proposed in the email: https://groups.google.com/forum/#!topic/clojure-dev/5uIH6iyvM6I

not sure, didn’t think it deeply through