Errors Don't Implement Sync Trait

[tonygrue]

(I'm using Rust for the first time, so apologies if this is known or intentional or a useless bug. Don't be afraid to tell me if I'm just doing it wrong.)

I'm implementing a web app with hyper and my returns are a Stream. i.e. Body::wrap_stream(GenerateStreamForResponse::new());

One thing my GenerateStreamForResponse does is use mysql_async and along the way that can generate an error. Body::wrap_stream however requires errors generated by the stream passed to it implement the Sync trait. I see from the docs, that mysql_async errors do not impl Sync (https://docs.rs/mysql_async/0.15.1/mysql_async/errors/struct.Error.html). Looking at the impl it looks like error_chain! is used, and looking at error_chain's issue tracker, it looks like this is known, and maybe intentional, but causing problems for users (rust-lang-deprecated/error-chain#240).

Perhaps I should just be translating these errors anyway, but it also looks like some other people are moving away from error_chain. Should mysql_async move away from error_chain, should mysql_async add it's voice to request error_chain support Sync, or should I just translate my error?

One thing I can say for certain, is this is one of a million paper cuts I've hit as a new rust user.

[blackbeam]

Hi!
Yeah. Move to Failure is scheduled but you should translate errors until then.

[blackbeam]

Fixed in v0.17.0