error: item has unused generic parameters
  --> $DIR/unsized_cast.rs:11:18
   |
LL | fn foo<T: Default>() {
   |        - generic parameter `T` is unused
LL |     let _: T = Default::default();
LL |     (|| Box::new(|| {}) as Box<dyn Fn()>)();
   |                  ^^

error: item has unused generic parameters
  --> $DIR/unsized_cast.rs:11:6
   |
LL | fn foo<T: Default>() {
   |        - generic parameter `T` is unused
LL |     let _: T = Default::default();
LL |     (|| Box::new(|| {}) as Box<dyn Fn()>)();
   |      ^^

error: item has unused generic parameters
  --> $DIR/unsized_cast.rs:22:15
   |
LL | fn foo2<T: Default>() {
   |         - generic parameter `T` is unused
...
LL |         call(&|| {}, ());
   |               ^^

error: item has unused generic parameters
  --> $DIR/unsized_cast.rs:19:6
   |
LL | fn foo2<T: Default>() {
   |         - generic parameter `T` is unused
LL |     let _: T = Default::default();
LL |     (|| {
   |      ^^

error: aborting due to 4 previous errors