<Ralph[m]> "i was playing around a bit in `..." <- > <@rursprung:matrix.org> i was playing around a bit in `embedded-hal` and realised that this seems possible for the custom `Error` types:
> 
> ```rust
> impl core::fmt::Display for dyn Error {
>     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
>         write!(f, "{:?}", self)
>     }
> }
> 
> impl core::error::Error for dyn Error {
> }
> ```
> 
> would it make sense to do this everywhere? 🤔
> then HALs presumably wouldn't have to do anything unless they want to give more details (e.g. by implementing `source()` or by having their own `impl Display` for their custom error type)
> 
> to be honest i'm surprised that this compiles - i didn't know that you can `impl .. for dyn ..` until a few minutes ago 😅

turns out that this doesn't seem to do what i wanted...

i've now raised two PRs, one with this option (maybe somebody gets it to work?) and one which works but is a bit more code:
* https://github.com/rust-embedded/embedded-hal/pull/629
* https://github.com/rust-embedded/embedded-hal/pull/630