src/test/ui/resolve/issue-5035-2.stderr

   1 error[E0277]: the size for values of type `(dyn I + 'static)` cannot be known at compilation time
   2   --> $DIR/issue-5035-2.rs:4:8
   3    |
   4 LL | fn foo(_x: K) {}
   5    |        ^^ doesn't have a size known at compile-time
   6    |
   7    = help: the trait `Sized` is not implemented for `(dyn I + 'static)`
   8    = help: unsized fn params are gated as an unstable feature
   9 help: function arguments must have a statically known size, borrowed types always have a known size
  10    |
  11 LL | fn foo(_x: &K) {}
  12    |            +
  13
  14 error: aborting due to previous error
  15
  16 For more information about this error, try `rustc --explain E0277`.