error[E0308]: mismatched types --> $DIR/issue-11374.rs:26:15 | LL | c.read_to(v); | ------- ^ | | | | | expected `&mut [u8]`, found struct `Vec` | | help: consider mutably borrowing here: `&mut v` | arguments to this method are incorrect | = note: expected mutable reference `&mut [u8]` found struct `Vec<_>` note: associated function defined here --> $DIR/issue-11374.rs:13:12 | LL | pub fn read_to(&mut self, vec: &mut [u8]) { | ^^^^^^^ -------------- error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.