--- /dev/null
+error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
+ --> $DIR/unsized-exprs3.rs:8:5
+ |
+LL | udrop as fn([u8]);
+ | ^^^^^ doesn't have a size known at compile-time
+ |
+ = help: the trait `std::marker::Sized` is not implemented for `[u8]`
+ = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
+ = note: all function arguments must have a statically known size
+ = help: unsized locals are gated as an unstable feature
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.