Error for calling non-existant enum constructor regression.

[tbelaire]

https://is.gd/Z7Xp3U
This code is giving much worse error message on nightly than on stable.

#[derive(Debug)]
enum Shape {
  Square { size: i32 },
  Circle { radius: i32 },
}


fn main() {
    println!("My shapre is {:?}", Shape::Squareee{ size: 5});
}

Nightly error message:

rustc 1.15.0-nightly (3bf2be9ce 2016-11-22)
error[E0223]: ambiguous associated type
  --> <anon>:10:35
   |
10 |     println!("My shapre is {:?}", Shape::Squareee{ size: 5});
   |                                   ^^^^^^^^^^^^^^ ambiguous associated type
   |
   = note: specify the type using the syntax `<Shape as Trait>::Squareee`

error: aborting due to previous error

Stable error message:

rustc 1.13.0 (2c6933acc 2016-11-07)
error[E0422]: `Shape::Squaree` does not name a structure
  --> <anon>:10:35
   |
10 |     println!("My shapre is {:?}", Shape::Squaree{ size: 5});
   |                                   ^^^^^^^^^^^^^^ not a structure

error: aborting due to previous error

The new error message is much less helpful