src/test/ui/traits/bound/not-on-bare-trait.stderr

   1 warning: trait objects without an explicit `dyn` are deprecated
   2   --> $DIR/not-on-bare-trait.rs:7:12
   3    |
   4 LL | fn foo(_x: Foo + Send) {
   5    |            ^^^^^^^^^^ help: use `dyn`: `dyn Foo + Send`
   6    |
   7    = note: `#[warn(bare_trait_objects)]` on by default
   8    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   9    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
  10
  11 error[E0277]: the size for values of type `(dyn Foo + Send + 'static)` cannot be known at compilation time
  12   --> $DIR/not-on-bare-trait.rs:7:8
  13    |
  14 LL | fn foo(_x: Foo + Send) {
  15    |        ^^ doesn't have a size known at compile-time
  16    |
  17    = help: the trait `Sized` is not implemented for `(dyn Foo + Send + 'static)`
  18    = help: unsized fn params are gated as an unstable feature
  19 help: function arguments must have a statically known size, borrowed types always have a known size
  20    |
  21 LL | fn foo(_x: &Foo + Send) {
  22    |            +
  23
  24 error: aborting due to previous error; 1 warning emitted
  25
  26 For more information about this error, try `rustc --explain E0277`.