These tests turned up a need for using the #[track_caller]
annotation in order to get accurate locations, which is fortunately
stable since Rust 1.46.0.
At least by default, we should have Error be private, and not expose
it as part of our APIs.
To keep functionality in `arti`, I had to add an `ExitTimeout` error
kind.
For interface consistency, I also re-exported ErrorKind and HasError
from `arti_client`.
This involves making a temporary ErrorKind::TODO. That will continue
to exist until all errors (at least, the ones that make it out to
here) can be properly categorised.
Introducing this will let us work from the top and bottom towards the
middle.
This needs two kinds. We have decided to treat a non-shutdown
SpawnError as "unexplained" rather than as an InternalError.
There are many crates whose
From<futures::task::SpawnError> for Error
erroneously treat it as an internal error. We will fix them in a moment.
Nick Mathewson
Ian Jackson