> I did see the docs about adding this extra macro crate for error messages but it seemed like a bit of a red flag that the framework was going against the gra

> I did see the docs about adding this extra macro crate for error messages but it seemed like a bit of a red flag that the framework was going against the grain of the language. Is it really going against the grain of the language? Or really that Rust still has issues with error messages on complex / deep types and that should be reported / fixed? Because leveraging the type system seems to be pretty in-line with normal Rust ideals, and Send issues is a load-bearing type error of the concurrency system.