1 error[E0277]: `std::rc::Rc<()>` cannot be sent between threads safely
2 --> $DIR/async-fn-nonsend.rs:50:5
4 LL | fn assert_send(_: impl Send) {}
5 | ---------------------------- required by `assert_send`
7 LL | assert_send(local_dropped_before_await());
8 | ^^^^^^^^^^^ `std::rc::Rc<()>` cannot be sent between threads safely
10 = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<()>`
11 = note: required because it appears within the type `impl std::fmt::Debug`
12 = note: required because it appears within the type `{impl std::fmt::Debug, impl std::future::Future, ()}`
13 = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:21:39: 26:2 {impl std::fmt::Debug, impl std::future::Future, ()}]`
14 = note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:21:39: 26:2 {impl std::fmt::Debug, impl std::future::Future, ()}]>`
15 = note: required because it appears within the type `impl std::future::Future`
16 = note: required because it appears within the type `impl std::future::Future`
18 error[E0277]: `std::rc::Rc<()>` cannot be sent between threads safely
19 --> $DIR/async-fn-nonsend.rs:52:5
21 LL | fn assert_send(_: impl Send) {}
22 | ---------------------------- required by `assert_send`
24 LL | assert_send(non_send_temporary_in_match());
25 | ^^^^^^^^^^^ `std::rc::Rc<()>` cannot be sent between threads safely
27 = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<()>`
28 = note: required because it appears within the type `impl std::fmt::Debug`
29 = note: required because it appears within the type `{fn(impl std::fmt::Debug) -> std::option::Option<impl std::fmt::Debug> {std::option::Option::<impl std::fmt::Debug>::Some}, fn() -> impl std::fmt::Debug {non_send}, impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, impl std::future::Future, ()}`
30 = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:28:40: 37:2 {fn(impl std::fmt::Debug) -> std::option::Option<impl std::fmt::Debug> {std::option::Option::<impl std::fmt::Debug>::Some}, fn() -> impl std::fmt::Debug {non_send}, impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, impl std::future::Future, ()}]`
31 = note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:28:40: 37:2 {fn(impl std::fmt::Debug) -> std::option::Option<impl std::fmt::Debug> {std::option::Option::<impl std::fmt::Debug>::Some}, fn() -> impl std::fmt::Debug {non_send}, impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, impl std::future::Future, ()}]>`
32 = note: required because it appears within the type `impl std::future::Future`
33 = note: required because it appears within the type `impl std::future::Future`
35 error[E0277]: `dyn std::fmt::Write` cannot be sent between threads safely
36 --> $DIR/async-fn-nonsend.rs:54:5
38 LL | fn assert_send(_: impl Send) {}
39 | ---------------------------- required by `assert_send`
41 LL | assert_send(non_sync_with_method_call());
42 | ^^^^^^^^^^^ `dyn std::fmt::Write` cannot be sent between threads safely
44 = help: the trait `std::marker::Send` is not implemented for `dyn std::fmt::Write`
45 = note: required because of the requirements on the impl of `std::marker::Send` for `&mut dyn std::fmt::Write`
46 = note: required because it appears within the type `std::fmt::Formatter<'_>`
47 = note: required because of the requirements on the impl of `std::marker::Send` for `&mut std::fmt::Formatter<'_>`
48 = note: required because it appears within the type `for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, impl std::future::Future, ()}`
49 = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, impl std::future::Future, ()}]`
50 = note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, impl std::future::Future, ()}]>`
51 = note: required because it appears within the type `impl std::future::Future`
52 = note: required because it appears within the type `impl std::future::Future`
54 error[E0277]: `*mut (dyn std::ops::Fn() + 'static)` cannot be shared between threads safely
55 --> $DIR/async-fn-nonsend.rs:54:5
57 LL | fn assert_send(_: impl Send) {}
58 | ---------------------------- required by `assert_send`
60 LL | assert_send(non_sync_with_method_call());
61 | ^^^^^^^^^^^ `*mut (dyn std::ops::Fn() + 'static)` cannot be shared between threads safely
63 = help: within `std::fmt::ArgumentV1<'_>`, the trait `std::marker::Sync` is not implemented for `*mut (dyn std::ops::Fn() + 'static)`
64 = note: required because it appears within the type `std::marker::PhantomData<*mut (dyn std::ops::Fn() + 'static)>`
65 = note: required because it appears within the type `core::fmt::Void`
66 = note: required because it appears within the type `&core::fmt::Void`
67 = note: required because it appears within the type `std::fmt::ArgumentV1<'_>`
68 = note: required because of the requirements on the impl of `std::marker::Send` for `std::slice::Iter<'_, std::fmt::ArgumentV1<'_>>`
69 = note: required because it appears within the type `std::fmt::Formatter<'_>`
70 = note: required because of the requirements on the impl of `std::marker::Send` for `&mut std::fmt::Formatter<'_>`
71 = note: required because it appears within the type `for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, impl std::future::Future, ()}`
72 = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, impl std::future::Future, ()}]`
73 = note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, impl std::future::Future, ()}]>`
74 = note: required because it appears within the type `impl std::future::Future`
75 = note: required because it appears within the type `impl std::future::Future`
77 error: aborting due to 4 previous errors
79 For more information about this error, try `rustc --explain E0277`.