Writing tokio code in rust has been difficult because of the Tokio Reform described in tokio.rs/blog/2018-02-tokio-… . The crate documentation doesn't clearly describe which crates are "old" and which are "new"... and mixing old and new leads to inscrutable error messages.
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I think, though, that tokio-core and tokio-io are old and busted, and the stuff in tokio::runtime and tokio::reactor are the new hotness?
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Replying to @snorp
The thing I'm working on depends on crates (like hyper) that depend on the old stuff, which means I can't use *any* of the new stuff, or things blow up ("what do you mean, that stream type doesn't implement Future?").

Mar 28, 2018 · 6:59 PM UTC

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Replying to @davidbaron @snorp
Things are kind of a mess right now. We're not even using tokio but we can't upgrade `futures` because `futures_cpupool` hasn't updated.
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On the other hand, maybe these inscrutable errors weren't caused by what I thought they were caused by, because now that I've converted everything back to old tokio I get them again.
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Replying to @davidbaron
Yeah, I'm in the same boat. Would rather they just break the API entirely than leave it half-working like this :/