+error[E0277]: the size for values of type `T` cannot be known at compilation time
+ --> $DIR/const-argument-if-length.rs:8:28
+ |
+LL | pub const fn is_zst<T: ?Sized>() -> usize {
+ | - this type parameter needs to be `Sized`
+LL | if std::mem::size_of::<T>() == 0 {
+ | ^ doesn't have a size known at compile-time
+ |
+ ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
+ |
+LL | pub const fn size_of<T>() -> usize {
+ | - required by this bound in `std::mem::size_of`
+
+error[E0080]: evaluation of constant value failed
+ --> $DIR/const-argument-if-length.rs:19:15
+ |
+LL | pad: [u8; is_zst::<T>()],
+ | ^^^^^^^^^^^^^ referenced constant has errors
+
+error[E0277]: the size for values of type `T` cannot be known at compilation time
+ --> $DIR/const-argument-if-length.rs:17:12
+ |
+LL | pub struct AtLeastByte<T: ?Sized> {
+ | - this type parameter needs to be `Sized`
+LL | value: T,
+ | ^ doesn't have a size known at compile-time
+ |
+ = note: only the last field of a struct may have a dynamically sized type
+ = help: change the field's type to have a statically known size
+help: borrowed types always have a statically known size
+ |
+LL | value: &T,
+ | ^
+help: the `Box` type always has a statically known size and allocates its contents in the heap
+ |
+LL | value: Box<T>,
+ | ^^^^ ^
+
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0080, E0277.
+For more information about an error, try `rustc --explain E0080`.