error[E0620]: cast to unsized type: `&[usize; 2]` as `[usize]`
  --> $DIR/issue-17441.rs:12:16
   |
LL |     let _foo = &[1_usize, 2] as [usize];
   |                ^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using an implicit coercion to `&[usize]` instead
  --> $DIR/issue-17441.rs:12:16
   |
LL |     let _foo = &[1_usize, 2] as [usize];
   |                ^^^^^^^^^^^^^^^^^^^^^^^^

error[E0620]: cast to unsized type: `std::boxed::Box<usize>` as `dyn std::fmt::Debug`
  --> $DIR/issue-17441.rs:15:16
   |
LL |     let _bar = Box::new(1_usize) as std::fmt::Debug;
   |                ^^^^^^^^^^^^^^^^^^^^^---------------
   |                                     |
   |                                     help: try casting to a `Box` instead: `Box<std::fmt::Debug>`

error[E0620]: cast to unsized type: `usize` as `dyn std::fmt::Debug`
  --> $DIR/issue-17441.rs:18:16
   |
LL |     let _baz = 1_usize as std::fmt::Debug;
   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using a box or reference as appropriate
  --> $DIR/issue-17441.rs:18:16
   |
LL |     let _baz = 1_usize as std::fmt::Debug;
   |                ^^^^^^^

error[E0620]: cast to unsized type: `[usize; 2]` as `[usize]`
  --> $DIR/issue-17441.rs:21:17
   |
LL |     let _quux = [1_usize, 2] as [usize];
   |                 ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using a box or reference as appropriate
  --> $DIR/issue-17441.rs:21:17
   |
LL |     let _quux = [1_usize, 2] as [usize];
   |                 ^^^^^^^^^^^^

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0620`.