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error[E0277]: `Cell<i32>` cannot be shared between threads safely
--> $DIR/generator-print-verbose-2.rs:19:5
|
LL | assert_send(|| {
| ^^^^^^^^^^^ `Cell<i32>` cannot be shared between threads safely
|
= help: the trait `Sync` is not implemented for `Cell<i32>`
= note: required because of the requirements on the impl of `Send` for `&'_#4r Cell<i32>`
note: required because it's used within this generator
--> $DIR/generator-print-verbose-2.rs:19:17
|
LL | assert_send(|| {
| ^^
note: required by a bound in `assert_send`
--> $DIR/generator-print-verbose-2.rs:10:23
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LL | fn assert_send<T: Send>(_: T) {}
| ^^^^ required by this bound in `assert_send`
error: generator cannot be shared between threads safely
--> $DIR/generator-print-verbose-2.rs:12:5
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LL | assert_sync(|| {
| ^^^^^^^^^^^ generator is not `Sync`
|
= help: within `[main::{closure#0} upvar_tys=() {Cell<i32>, ()}]`, the trait `Sync` is not implemented for `Cell<i32>`
note: generator is not `Sync` as this value is used across a yield
--> $DIR/generator-print-verbose-2.rs:15:9
|
LL | let a = Cell::new(2);
| - has type `Cell<i32>` which is not `Sync`
LL | yield;
| ^^^^^ yield occurs here, with `a` maybe used later
LL | });
| - `a` is later dropped here
note: required by a bound in `assert_sync`
--> $DIR/generator-print-verbose-2.rs:9:23
|
LL | fn assert_sync<T: Sync>(_: T) {}
| ^^^^ required by this bound in `assert_sync`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
|
