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|
error: generator cannot be sent between threads safely
--> $DIR/generator-print-verbose-1.rs:40:18
|
LL | require_send(send_gen);
| ^^^^^^^^ generator is not `Send`
|
= help: the trait `Sync` is not implemented for `RefCell<i32>`
= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
note: generator is not `Send` as this value is used across a yield
--> $DIR/generator-print-verbose-1.rs:38:9
|
LL | let _non_send_gen = make_non_send_generator();
| ------------- has type `Opaque(DefId(0:34 ~ generator_print_verbose_1[749a]::make_non_send_generator::{opaque#0}), [])` which is not `Send`
LL | yield;
| ^^^^^ yield occurs here, with `_non_send_gen` maybe used later
LL | };
| - `_non_send_gen` is later dropped here
note: required by a bound in `require_send`
--> $DIR/generator-print-verbose-1.rs:29:25
|
LL | fn require_send(_: impl Send) {}
| ^^^^ required by this bound in `require_send`
error[E0277]: `RefCell<i32>` cannot be shared between threads safely
--> $DIR/generator-print-verbose-1.rs:59:18
|
LL | require_send(send_gen);
| ------------ ^^^^^^^^ `RefCell<i32>` cannot be shared between threads safely
| |
| required by a bound introduced by this call
|
= help: the trait `Sync` is not implemented for `RefCell<i32>`
= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
= note: required for `Arc<RefCell<i32>>` to implement `Send`
note: required because it's used within this generator
--> $DIR/generator-print-verbose-1.rs:45:5
|
LL | || {
| ^^
note: required because it appears within the type `Opaque(DefId(0:35 ~ generator_print_verbose_1[749a]::make_gen2::{opaque#0}), [Arc<RefCell<i32>>])`
--> $DIR/generator-print-verbose-1.rs:44:30
|
LL | pub fn make_gen2<T>(t: T) -> impl Generator<Return = T> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
note: required because it appears within the type `Opaque(DefId(0:36 ~ generator_print_verbose_1[749a]::make_non_send_generator2::{opaque#0}), [])`
--> $DIR/generator-print-verbose-1.rs:50:34
|
LL | fn make_non_send_generator2() -> impl Generator<Return = Arc<RefCell<i32>>> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: required because it captures the following types: `Opaque(DefId(0:36 ~ generator_print_verbose_1[749a]::make_non_send_generator2::{opaque#0}), [])`, `()`
note: required because it's used within this generator
--> $DIR/generator-print-verbose-1.rs:55:20
|
LL | let send_gen = || {
| ^^
note: required by a bound in `require_send`
--> $DIR/generator-print-verbose-1.rs:29:25
|
LL | fn require_send(_: impl Send) {}
| ^^^^ required by this bound in `require_send`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
|
