src/test/ui/associated-item/issue-48027.stderr

   1 error[E0038]: the trait `Bar` cannot be made into an object
   2   --> $DIR/issue-48027.rs:6:6
   3    |
   4 LL | impl dyn Bar {}
   5    |      ^^^^^^^ `Bar` cannot be made into an object
   6    |
   7    = help: consider moving `X` to another trait
   8 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>
   9   --> $DIR/issue-48027.rs:2:11
  10    |
  11 LL | trait Bar {
  12    |       --- this trait cannot be made into an object...
  13 LL |     const X: usize;
  14    |           ^ ...because it contains this associated `const`
  15
  16 error[E0283]: type annotations needed
  17   --> $DIR/issue-48027.rs:3:32
  18    |
  19 LL |     fn return_n(&self) -> [u8; Bar::X];
  20    |                                ^^^^^^
  21    |                                |
  22    |                                cannot infer type
  23    |                                help: use the fully qualified path to an implementation: `<Type as Bar>::X`
  24    |
  25    = note: cannot satisfy `_: Bar`
  26    = note: associated constants cannot be accessed directly on a `trait`, they can only be accessed through a specific `impl`
  27 note: required by `Bar::X`
  28   --> $DIR/issue-48027.rs:2:5
  29    |
  30 LL |     const X: usize;
  31    |     ^^^^^^^^^^^^^^^
  32
  33 error: aborting due to 2 previous errors
  34
  35 Some errors have detailed explanations: E0038, E0283.
  36 For more information about an error, try `rustc --explain E0038`.