error: generator cannot be shared between threads safely --> $DIR/not-send-sync.rs:17:17 | LL | assert_sync(|| { | _________________^ LL | | LL | | let a = NotSync; LL | | yield; LL | | drop(a); LL | | }); | |_____^ generator is not `Sync` | = help: within `[generator@$DIR/not-send-sync.rs:17:17: 17:19]`, the trait `Sync` is not implemented for `NotSync` note: generator is not `Sync` as this value is used across a yield --> $DIR/not-send-sync.rs:20:9 | LL | let a = NotSync; | - has type `NotSync` which is not `Sync` LL | yield; | ^^^^^ yield occurs here, with `a` maybe used later LL | drop(a); LL | }); | - `a` is later dropped here note: required by a bound in `assert_sync` --> $DIR/not-send-sync.rs:14:23 | LL | fn assert_sync(_: T) {} | ^^^^ required by this bound in `assert_sync` error: generator cannot be sent between threads safely --> $DIR/not-send-sync.rs:24:17 | LL | assert_send(|| { | _________________^ LL | | LL | | let a = NotSend; LL | | yield; LL | | drop(a); LL | | }); | |_____^ generator is not `Send` | = help: within `[generator@$DIR/not-send-sync.rs:24:17: 24:19]`, the trait `Send` is not implemented for `NotSend` note: generator is not `Send` as this value is used across a yield --> $DIR/not-send-sync.rs:27:9 | LL | let a = NotSend; | - has type `NotSend` which is not `Send` LL | yield; | ^^^^^ yield occurs here, with `a` maybe used later LL | drop(a); LL | }); | - `a` is later dropped here note: required by a bound in `assert_send` --> $DIR/not-send-sync.rs:15:23 | LL | fn assert_send(_: T) {} | ^^^^ required by this bound in `assert_send` error: aborting due to 2 previous errors