error[E0308]: mismatched types --> $DIR/issue-61106.rs:3:9 | LL | foo(x.clone()); | --- ^^^^^^^^^ | | | | | expected `&str`, found `String` | | help: consider borrowing here: `&x` | arguments to this function are incorrect | note: function defined here --> $DIR/issue-61106.rs:6:4 | LL | fn foo(_: &str) {} | ^^^ ------- error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.