error[E0277]: the size for values of type `[u8]` cannot be known at compilation time --> $DIR/into-boxed-slice-fail.rs:7:35 | LL | let _ = Box::into_boxed_slice(boxed_slice); | --------------------- ^^^^^^^^^^^ doesn't have a size known at compile-time | | | required by a bound introduced by this call | = help: the trait `Sized` is not implemented for `[u8]` note: required by a bound in `Box::::into_boxed_slice` --> $SRC_DIR/alloc/src/boxed.rs:LL:COL | LL | impl Box { | ^ required by this bound in `Box::::into_boxed_slice` error[E0277]: the size for values of type `[u8]` cannot be known at compilation time --> $DIR/into-boxed-slice-fail.rs:7:13 | LL | let _ = Box::into_boxed_slice(boxed_slice); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time | = help: the trait `Sized` is not implemented for `[u8]` = note: slice and array elements must have `Sized` type error[E0277]: the size for values of type `dyn Debug` cannot be known at compilation time --> $DIR/into-boxed-slice-fail.rs:11:35 | LL | let _ = Box::into_boxed_slice(boxed_trait); | --------------------- ^^^^^^^^^^^ doesn't have a size known at compile-time | | | required by a bound introduced by this call | = help: the trait `Sized` is not implemented for `dyn Debug` note: required by a bound in `Box::::into_boxed_slice` --> $SRC_DIR/alloc/src/boxed.rs:LL:COL | LL | impl Box { | ^ required by this bound in `Box::::into_boxed_slice` error[E0277]: the size for values of type `dyn Debug` cannot be known at compilation time --> $DIR/into-boxed-slice-fail.rs:11:13 | LL | let _ = Box::into_boxed_slice(boxed_trait); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time | = help: the trait `Sized` is not implemented for `dyn Debug` = note: slice and array elements must have `Sized` type error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0277`.