error[E0308]: mismatched types
  --> $DIR/liveness-missing-ret2.rs:1:17
   |
LL |   fn f() -> isize { //~ ERROR mismatched types
   |  _________________^
LL | |     // Make sure typestate doesn't interpret this match expression as
LL | |     // the function result
LL | |    match true { true => { } _ => {} };
LL | | }
   | |_^ expected isize, found ()
   |
   = note: expected type `isize`
              found type `()`

error: aborting due to previous error

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