Issue with suggestion for Clone

[areteCocoa]

I wrote an implementation for Clone but forgot to import it. Here's the error I got initially:

src/server/service.rs:123:67: 123:74 error: no method named `clone` found for type `server::service::OpenTime` in the current scope
src/server/service.rs:123             s.open_times.insert(key.clone().to_string(), (*value).clone());
                                                                                            ^~~~~~~
note: in expansion of for loop expansion
src/server/service.rs:122:9: 124:10 note: expansion site
src/server/service.rs:123:67: 123:74 help: items from traits can only be used if the trait is implemented and in scope; the following trait defines an item `clone`, perhaps you need to implement it:
src/server/service.rs:123:67: 123:74 help: candidate #1: `core::clone::Clone`

After importing core, this came next:

src/server/service.rs:8:1: 8:19 error: use of unstable library feature 'core'
src/server/service.rs:8 extern crate core;

It's a bit misleading to suggest core and not the std library version of it.

[apasel422]

Clone is in the prelude, so it shouldn't need to be imported, but it's possible you aren't using the prelude.

In any case, the issue with suggesting core is basically #23355 and #23224.

[apasel422]

#26635 is similar.

[areteCocoa]

You are correct, I was not using the prelude.