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`.