tests/ui/object-safety/object-safety-no-static.object_safe_for_dispatch.stderr

   1 error[E0038]: the trait `Foo` cannot be made into an object
   2   --> $DIR/object-safety-no-static.rs:22:27
   3    |
   4 LL |     let b: Box<dyn Foo> = Box::new(Bar);
   5    |                           ^^^^^^^^^^^^^ `Foo` cannot be made into an object
   6    |
   7 note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
   8   --> $DIR/object-safety-no-static.rs:9:8
   9    |
  10 LL | trait Foo {
  11    |       --- this trait cannot be made into an object...
  12 LL |     fn foo() {}
  13    |        ^^^ ...because associated function `foo` has no `self` parameter
  14    = note: required for `Box<Bar>` to implement `CoerceUnsized<Box<dyn Foo>>`
  15    = note: required by cast to type `Box<dyn Foo>`
  16 help: consider turning `foo` into a method by giving it a `&self` argument
  17    |
  18 LL |     fn foo(&self) {}
  19    |            +++++
  20 help: alternatively, consider constraining `foo` so it does not apply to trait objects
  21    |
  22 LL |     fn foo() where Self: Sized {}
  23    |              +++++++++++++++++
  24
  25 error: aborting due to previous error
  26
  27 For more information about this error, try `rustc --explain E0038`.