error[E0277]: the size for values of type `[{integer}]` cannot be known at compilation time
  --> $DIR/issue-17651.rs:5:18
   |
LL |     (|| Box::new(*(&[0][..])))();
   |                  ^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[{integer}]`
   = note: required by `Box::<T>::new`

error[E0277]: the size for values of type `[{integer}]` cannot be known at compilation time
  --> $DIR/issue-17651.rs:5:9
   |
LL |     (|| Box::new(*(&[0][..])))();
   |         ^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[{integer}]`
   = note: all function arguments must have a statically known size
   = help: unsized fn params are gated as an unstable feature

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.