error[E0087]: too many type parameters provided: expected at most 0 type parameters, found 1 type parameter
  --> $DIR/trait-test-2.rs:18:14
   |
LL |     10.dup::<i32>(); //~ ERROR expected at most 0 type parameters, found 1 type parameter
   |              ^^^ expected 0 type parameters

error[E0087]: too many type parameters provided: expected at most 1 type parameter, found 2 type parameters
  --> $DIR/trait-test-2.rs:19:20
   |
LL |     10.blah::<i32, i32>(); //~ ERROR expected at most 1 type parameter, found 2 type parameters
   |                    ^^^ expected 1 type parameter

error[E0277]: the trait bound `dyn bar: bar` is not satisfied
  --> $DIR/trait-test-2.rs:20:26
   |
LL |     (box 10 as Box<bar>).dup();
   |                          ^^^ the trait `bar` is not implemented for `dyn bar`

error[E0038]: the trait `bar` cannot be made into an object
  --> $DIR/trait-test-2.rs:20:16
   |
LL |     (box 10 as Box<bar>).dup();
   |                ^^^^^^^^ the trait `bar` cannot be made into an object
   |
   = note: method `dup` references the `Self` type in its arguments or return type
   = note: method `blah` has generic type parameters

error[E0038]: the trait `bar` cannot be made into an object
  --> $DIR/trait-test-2.rs:20:6
   |
LL |     (box 10 as Box<bar>).dup();
   |      ^^^^^^ the trait `bar` cannot be made into an object
   |
   = note: method `dup` references the `Self` type in its arguments or return type
   = note: method `blah` has generic type parameters
   = note: required because of the requirements on the impl of `std::ops::CoerceUnsized<std::boxed::Box<dyn bar>>` for `std::boxed::Box<{integer}>`

error: aborting due to 5 previous errors

Some errors occurred: E0038, E0087, E0277.
For more information about an error, try `rustc --explain E0038`.