error[E0382]: use of moved value: `state` --> $DIR/issue-101119.rs:7:14 | LL | fn fill_memory_blocks_mt(state: &mut State) { | ----- move occurs because `state` has type `&mut State`, which does not implement the `Copy` trait LL | loop { LL | once(move || { | ^^^^^^^ value moved into closure here, in previous iteration of loop LL | LL | fill_segment(state); | ----- use occurs due to use in closure error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0382`.