error[E0308]: mismatched types --> $DIR/terr-sorts.rs:10:14 | LL | want_foo(b); | -------- ^ expected struct `Foo`, found struct `Box` | | | arguments to this function are incorrect | = note: expected struct `Foo` found struct `Box` note: function defined here --> $DIR/terr-sorts.rs:8:4 | LL | fn want_foo(f: Foo) {} | ^^^^^^^^ ------ help: consider unboxing the value | LL | want_foo(*b); | + error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.