error[E0277]: the trait bound `MyStruct: MyTrait` is not satisfied
 --> tests/ui/fail/trait_not_implemented.rs:8:13
  |
8 | #[trait_map(MyTrait)]
  |             ^^^^^^^ the trait `MyTrait` is not implemented for `MyStruct`
  |
  = note: required for the cast from `MyStruct` to the object type `dyn MyTrait`