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

error: aborting due to 1 previous error

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