[ndriscoll]

I agree the ? proposal seems bad, which is why I didn't speak directly to it (but gave do notation as an example of a better solution that addresses the concern about special syntax for `error` specifically). Just the idea that explicit if err! = nil return err everywhere is somehow useful.

My experience with high level banking and low-level networking applications is that the default path for error handling is that you want to bubble up to central handlers the vast majority of the time. There's a reason why exceptions are a popular language feature; they're just hard to make work with fibres. With scripting you often don't want to handle errors at all. Just set -euo.