error[E0308]: mismatched types
  --> $DIR/dst-bad-coerce1.rs:14:29
   |
LL |     let f3: &Fat<[usize]> = f2;
   |             -------------   ^^ expected `&Fat<[usize]>`, found `&Fat<[isize; 3]>`
   |             |
   |             expected due to this
   |
   = note: expected reference `&Fat<[usize]>`
              found reference `&Fat<[isize; 3]>`

error[E0277]: the trait bound `Foo: Bar` is not satisfied
  --> $DIR/dst-bad-coerce1.rs:20:29
   |
LL |     let f3: &Fat<dyn Bar> = f2;
   |                             ^^ unsatisfied trait bound
   |
help: the trait `Bar` is not implemented for `Foo`
  --> $DIR/dst-bad-coerce1.rs:7:1
   |
LL | struct Foo;
   | ^^^^^^^^^^
help: this trait has no implementations, consider adding one
  --> $DIR/dst-bad-coerce1.rs:8:1
   |
LL | trait Bar { fn bar(&self) {} }
   | ^^^^^^^^^
   = note: required for the cast from `&Fat<Foo>` to `&Fat<dyn Bar>`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.