Spurious error reported after name not found in scope

[joshlf]

I have the following code:

impl<H> AddrVec<H, DeviceId> {
    pub fn device(&self) -> DeviceId {
        self.tail()
    }
}

I forgot to use DeviceId, so it wasn't in scope. rustc gave me the following errors:

error[E0412]: cannot find type `DeviceId` in this scope
   --> src/address.rs:343:20
    |
343 | impl<H> AddrVec<H, DeviceId> {
    |                    ^^^^^^^^ not found in this scope
help: possible candidate is found in another module, you can import it into scope
    |
5   | use crate::device::DeviceId;
    |

error[E0412]: cannot find type `DeviceId` in this scope
   --> src/address.rs:344:29
    |
344 |     pub fn device(&self) -> DeviceId {
    |                             ^^^^^^^^ not found in this scope
help: possible candidate is found in another module, you can import it into scope
    |
5   | use crate::device::DeviceId;
    |

error[E0307]: invalid method receiver type: &address::AddrVec<H, [type error]>
   --> src/address.rs:344:19
    |
344 |     pub fn device(&self) -> DeviceId {
    |                   ^^^^^
    |
    = note: type must be `Self` or a type that dereferences to it
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`

Maybe this is the intended behavior, but it seems odd to report an invalid method receiver type error simply because the type's name was unknown.