1 error[E0308]: mismatched types
2 --> $DIR/terr-in-field.rs:23:14
4 LL | want_foo(b); //~ ERROR mismatched types
5 | ^ expected struct `foo`, found struct `bar`
7 = note: expected type `foo`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.