error[E0308]: mismatched types
  --> $DIR/terr-in-field.rs:13:14
   |
LL |     want_foo(b);
   |     -------- ^ expected `Foo`, found `Bar`
   |     |
   |     arguments to this function are incorrect
   |
note: function defined here
  --> $DIR/terr-in-field.rs:11:4
   |
LL | fn want_foo(f: Foo) {}
   |    ^^^^^^^^ ------

error: aborting due to previous error

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