`Into<[type error]>` in diagnostic

[lylythechosenone]

Given the following code:

pub enum LabelText {
    Plain,
}
impl<T> From<T> for LabelText
where
    T: Into<Cow<'static, str>>,
{
    fn from(text: T) -> Self {
        LabelText::Plain(text.into())
    }
}

The current output is:

error[E0119]: conflicting implementations of trait `core::convert::From<error::LabelText>` for type `error::LabelText`
  --> src/error.rs:40:1
   |
40 | impl<T> From<T> for LabelText
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: conflicting implementation in crate `core`:
           - impl<T> core::convert::From<T> for T;
   = note: downstream crates may implement trait `core::convert::Into<[type error]>` for type `error::LabelText`

I doubt it's supposed to be Into<[type error]>

[compiler-errors]

We can just skip adding this note if the type references error

[bhbs]

@rustbot claim