src/test/ui/error-codes/E0033.stderr

   1 error[E0423]: expected value, found trait `SomeTrait`
   2   --> $DIR/E0033.rs:6:37
   3    |
   4 LL |     let trait_obj: &dyn SomeTrait = SomeTrait;
   5    |                                     ^^^^^^^^^ not a value
   6
   7 error[E0038]: the trait `SomeTrait` cannot be made into an object
   8   --> $DIR/E0033.rs:6:20
   9    |
  10 LL |     let trait_obj: &dyn SomeTrait = SomeTrait;
  11    |                    ^^^^^^^^^^^^^^ `SomeTrait` cannot be made into an object
  12    |
  13 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>
  14   --> $DIR/E0033.rs:2:8
  15    |
  16 LL | trait SomeTrait {
  17    |       --------- this trait cannot be made into an object...
  18 LL |     fn foo();
  19    |        ^^^ ...because associated function `foo` has no `self` parameter
  20 help: consider turning `foo` into a method by giving it a `&self` argument
  21    |
  22 LL |     fn foo(&self);
  23    |            ^^^^^
  24 help: alternatively, consider constraining `foo` so it does not apply to trait objects
  25    |
  26 LL |     fn foo() where Self: Sized;
  27    |              ^^^^^^^^^^^^^^^^^
  28
  29 error[E0033]: type `&dyn SomeTrait` cannot be dereferenced
  30   --> $DIR/E0033.rs:10:9
  31    |
  32 LL |     let &invalid = trait_obj;
  33    |         ^^^^^^^^ type `&dyn SomeTrait` cannot be dereferenced
  34
  35 error: aborting due to 3 previous errors
  36
  37 Some errors have detailed explanations: E0033, E0038, E0423.
  38 For more information about an error, try `rustc --explain E0033`.