error[E0308]: mismatched types
  --> $DIR/equality2.rs:25:18
   |
LL |     let _: u32 = hide(0_u32);
   |                  ^^^^^^^^^^^ expected u32, found opaque type
   |
   = note:     expected type `u32`
           found opaque type `impl Foo`

error[E0308]: mismatched types
  --> $DIR/equality2.rs:31:18
   |
LL |     let _: i32 = Leak::leak(hide(0_i32));
   |                  ^^^^^^^^^^^^^^^^^^^^^^^ expected i32, found associated type
   |
   = note:         expected type `i32`
           found associated type `<impl Foo as Leak>::T`
   = note: consider constraining the associated type `<impl Foo as Leak>::T` to `i32`
   = note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html

error[E0308]: mismatched types
  --> $DIR/equality2.rs:38:10
   |
LL |     x = (x.1,
   |          ^^^ expected u32, found i32
   |
   = note: expected opaque type `impl Foo` (u32)
              found opaque type `impl Foo` (i32)

error[E0308]: mismatched types
  --> $DIR/equality2.rs:41:10
   |
LL |          x.0);
   |          ^^^ expected i32, found u32
   |
   = note: expected opaque type `impl Foo` (i32)
              found opaque type `impl Foo` (u32)

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0308`.