I'm a recent snafu (https://docs.rs/snafu/latest/snafu/) convert over thiserror (https://docs.rs/thiserror/latest/thiserror/). You pay the cost of adding `context` calls at error sites but it leads to great error propagation and enables multiple error variants that reference the same source error type which I always had issues with in `thiserror`.
No dogma. If you want an error per module that seems like a good way to start, but for complex cases where you want to break an error down more, we'll often have an error type per function/struct/trait.
No dogma. If you want an error per module that seems like a good way to start, but for complex cases where you want to break an error down more, we'll often have an error type per function/struct/trait.