error[E0382]: borrow of moved value: `a.b` --> $DIR/issue-52669.rs:15:5 | LL | fn bar(mut a: A) -> B { | ----- move occurs because `a` has type `A`, which does not implement the `Copy` trait LL | a.b = B; LL | foo(a); | - value moved here LL | a.b.clone() | ^^^ value borrowed here after move error: aborting due to previous error For more information about this error, try `rustc --explain E0382`.