Confusing error message wording for moving out of non-copy slices.

[solson]

https://is.gd/iH1SwT

let x = vec![String::from("foo")].into_boxed_slice();
let y = x[0];

// error: cannot move out of type `[std::string::String]`, a non-copy fixed-size array [--explain E0508]

It refers to the slice as a fixed-sized array. This can also be reproduced with a Vec<String> by indexing (*x)[0] instead of indexing x[0].

[Mark-Simulacrum]

The error message today is better, but not ideal. array should probably be slice.

error[E0508]: cannot move out of type `[std::string::String]`, a non-copy array
 --> test.rs:3:9
  |
3 | let y = x[0];
  |         ^^^^
  |         |
  |         help: consider using a reference instead `&x[0]`
  |         cannot move out of here

error: aborting due to previous error(s)

[gaurikholkar-zz]

@akazuko you can look at this to start of with! Is someone already working on this? I can write some instructions.