Considering you've backpedaled from "Rust isn't CSP" (because you misunderstood Rust channels) to "Rust doesn't have select" (which it does, and you didn't realize) to "Rust's select isn't as mature as Go's", that's probably for the best.

Perhaps you should try to be more informed about Rust before you try to have an argument about it in the future!

I said 2 things in very first comment. I never claimed rust doesn't have select. This is quoted from my very first comment in this thread,

AFAIK, rust also doesn't allow selecting between a send and receive on channels. It only allows selecting over a set of receivers and even there it doesn't offer something like the default clause of Go's select statement.

Perhaps you should try to read my comments in their entirety before making accusations.

Yes I missed sync_channel, but if that is all CSP was, Java does CSP too. It has Threads and SynchronousQueue exactly like rust 1.0 will.

I thought you were done? Apparently not!

This is where I again point out that neither Java nor Go ensure that state sent over channels is actually isolated, and both allow data races.

With Rust that is not the case. You have true isolation (unless you explicitly opt not to)