error[E0308]: mismatched types
  --> $DIR/issue-4968.rs:15:16
   |
LL |     match 42 { A => () }
   |                ^ expected integral variable, found tuple
   |
   = note: expected type `{integer}`
              found type `(isize, isize)`

error: aborting due to previous error

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