error[E0277]: the trait bound `std::cell::Cell<i32>: std::marker::Sync` is not satisfied
  --> $DIR/not-send-sync.rs:26:5
   |
26 |     assert_send(|| {
   |     ^^^^^^^^^^^ `std::cell::Cell<i32>` cannot be shared between threads safely
   |
   = help: the trait `std::marker::Sync` is not implemented for `std::cell::Cell<i32>`
   = note: required because of the requirements on the impl of `std::marker::Send` for `&std::cell::Cell<i32>`
   = note: required because it appears within the type `[generator@$DIR/not-send-sync.rs:26:17: 30:6 a:&std::cell::Cell<i32> _]`
   = note: required by `main::assert_send`

error[E0277]: the trait bound `std::cell::Cell<i32>: std::marker::Sync` is not satisfied in `[generator@$DIR/not-send-sync.rs:19:17: 23:6 ((), std::cell::Cell<i32>)]`
  --> $DIR/not-send-sync.rs:19:5
   |
19 |     assert_sync(|| {
   |     ^^^^^^^^^^^ `std::cell::Cell<i32>` cannot be shared between threads safely
   |
   = help: within `[generator@$DIR/not-send-sync.rs:19:17: 23:6 ((), std::cell::Cell<i32>)]`, the trait `std::marker::Sync` is not implemented for `std::cell::Cell<i32>`
   = note: required because it appears within the type `((), std::cell::Cell<i32>)`
   = note: required because it appears within the type `[generator@$DIR/not-send-sync.rs:19:17: 23:6 ((), std::cell::Cell<i32>)]`
   = note: required by `main::assert_sync`

error: aborting due to 2 previous errors