Diesel's derives have been fully rewritten to take advantage of the new error reporting features available on nightly Rust. If you enable the `unstable` feature with Diesel's master branch, you get much nicer errors!pic.twitter.com/zOGKVEQdA6
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`#[derive(Debug)]`, etc receive the body of your struct as input. They can't see anything else about it. There's no way to ask questions like "does a type at this path exist" or "does this type implement this trait"
Doesn't necessarily have anything to do with runtime. Lints are able to ask both of those questions.
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