Confusing error when using Self in generic impl block missing trait bounds

[cauebs]

#[derive(Default)]
struct Foo<T> {
    bar: Box<[T]>,
}

impl<T> Foo<T> {
    fn new() -> Self {
        Self::default()
    }
}

This gives me the following error:

error[E0599]: no function or associated item named `default` found for type `Foo<T>` in the current scope
 --> src/main.rs:8:9
  |
2 | struct Foo<T> {
  | ------------- function or associated item `default` not found for this
...
8 |         Self::default()
  |         ^^^^^^^^^^^^^ function or associated item not found in `Foo<T>`
  |
  = note: the method `default` exists but the following trait bounds were not satisfied:
          `Foo<T> : std::default::Default`
  = help: items from traits can only be used if the trait is implemented and in scope
  = note: the following trait defines an item `default`, perhaps you need to implement it:
          candidate #1: `std::default::Default`

If I change Self::default() to Foo::default(), I get the following error, which is much more straightforward:

error[E0277]: the trait bound `T: std::default::Default` is not satisfied
 --> src/main.rs:8:9
  |
8 |         Foo::default()
  |         ^^^^^^^^^^^^ the trait `std::default::Default` is not implemented for `T`
  |
  = help: consider adding a `where T: std::default::Default` bound
  = note: required because of the requirements on the impl of `std::default::Default` for `Foo<T>`
  = note: required by `std::default::Default::default`

Both can be fixed by adding a trait bound to the impl block (impl<T: Default> Foo<T> {...}).