59 lines
2.1 KiB
Plaintext
59 lines
2.1 KiB
Plaintext
error[E0277]: `Cell<i32>` cannot be shared between threads safely
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--> $DIR/not-send-sync.rs:16:17
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LL | assert_send(|| {
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| _____-----------_^
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| | |
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| | required by a bound introduced by this call
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LL | |
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LL | | drop(&a);
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LL | | yield;
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LL | | });
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| |_____^ `Cell<i32>` cannot be shared between threads safely
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= help: the trait `Sync` is not implemented for `Cell<i32>`
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= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` or `std::sync::atomic::AtomicI32` instead
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= note: required for `&Cell<i32>` to implement `Send`
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note: required because it's used within this generator
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--> $DIR/not-send-sync.rs:16:17
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LL | assert_send(|| {
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| ^^
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note: required by a bound in `assert_send`
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--> $DIR/not-send-sync.rs:7:23
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LL | fn assert_send<T: Send>(_: T) {}
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| ^^^^ required by this bound in `assert_send`
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error: generator cannot be shared between threads safely
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--> $DIR/not-send-sync.rs:9:17
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LL | assert_sync(|| {
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| _________________^
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LL | |
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LL | | let a = Cell::new(2);
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LL | | yield;
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LL | | });
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| |_____^ generator is not `Sync`
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= help: within `[generator@$DIR/not-send-sync.rs:9:17: 9:19]`, the trait `Sync` is not implemented for `Cell<i32>`
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= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` or `std::sync::atomic::AtomicI32` instead
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note: generator is not `Sync` as this value is used across a yield
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--> $DIR/not-send-sync.rs:12:9
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LL | let a = Cell::new(2);
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| - has type `Cell<i32>` which is not `Sync`
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LL | yield;
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| ^^^^^ yield occurs here, with `a` maybe used later
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LL | });
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| - `a` is later dropped here
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note: required by a bound in `assert_sync`
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--> $DIR/not-send-sync.rs:6:23
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LL | fn assert_sync<T: Sync>(_: T) {}
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| ^^^^ required by this bound in `assert_sync`
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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