error[E0308]: try expression alternatives have incompatible types
  --> $DIR/issue-59756.rs:13:5
   |
LL |     foo()?
   |     ^^^^^-
   |     |    |
   |     |    help: try removing this `?`
   |     expected enum `std::result::Result`, found struct `A`
   |
   = note: expected type `std::result::Result<A, B>`
              found type `A`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.