1 error: future cannot be shared between threads safely
2 --> $DIR/issue-64130-1-sync.rs:25:13
5 | ^^^^^ future returned by `bar` is not `Sync`
7 = help: within `impl Future<Output = ()>`, the trait `Sync` is not implemented for `Foo`
8 note: future is not `Sync` as this value is used across an await
9 --> $DIR/issue-64130-1-sync.rs:18:10
12 | - has type `Foo` which is not `Sync`
14 | ^^^^^^ await occurs here, with `x` maybe used later
15 note: required by a bound in `is_sync`
16 --> $DIR/issue-64130-1-sync.rs:14:15
18 LL | fn is_sync<T: Sync>(t: T) { }
19 | ^^^^ required by this bound in `is_sync`
21 error: aborting due to previous error