error: type is not an enum (TryFromU32)
  --> $DIR/errors.rs:11:1
   |
LL | struct MyStruct {}
   | ^^^^^^

error: enum variant cannot have fields (TryFromU32)
  --> $DIR/errors.rs:18:7
   |
LL |     D(bool),
   |       ^^^^

error: enum variant cannot have fields (TryFromU32)
  --> $DIR/errors.rs:19:7
   |
LL |     E(bool, bool),
   |       ^^^^

error: enum variant cannot have fields (TryFromU32)
  --> $DIR/errors.rs:20:9
   |
LL |     F { x: bool },
   |         ^

error: enum variant cannot have fields (TryFromU32)
  --> $DIR/errors.rs:21:9
   |
LL |     G { x: bool, y: bool },
   |         ^

error: aborting due to 5 previous errors