error: future cannot be sent between threads safely --> $DIR/async-fn-nonsend.rs:70:17 | LL | assert_send(local_dropped_before_await()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future returned by `local_dropped_before_await` is not `Send` | = help: within `impl Future`, the trait `Send` is not implemented for `Rc<()>` note: future is not `Send` as this value is used across an await --> $DIR/async-fn-nonsend.rs:27:11 | LL | let x = non_send(); | - has type `impl Debug` which is not `Send` LL | drop(x); LL | fut().await; | ^^^^^ await occurs here, with `x` maybe used later LL | } | - `x` is later dropped here note: required by a bound in `assert_send` --> $DIR/async-fn-nonsend.rs:67:24 | LL | fn assert_send(_: impl Send) {} | ^^^^ required by this bound in `assert_send` error: future cannot be sent between threads safely --> $DIR/async-fn-nonsend.rs:72:17 | LL | assert_send(non_send_temporary_in_match()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future returned by `non_send_temporary_in_match` is not `Send` | = help: within `impl Future`, the trait `Send` is not implemented for `Rc<()>` note: future is not `Send` as this value is used across an await --> $DIR/async-fn-nonsend.rs:36:26 | LL | match Some(non_send()) { | ---------- has type `impl Debug` which is not `Send` LL | Some(_) => fut().await, | ^^^^^ await occurs here, with `non_send()` maybe used later ... LL | } | - `non_send()` is later dropped here note: required by a bound in `assert_send` --> $DIR/async-fn-nonsend.rs:67:24 | LL | fn assert_send(_: impl Send) {} | ^^^^ required by this bound in `assert_send` error: future cannot be sent between threads safely --> $DIR/async-fn-nonsend.rs:74:17 | LL | assert_send(non_sync_with_method_call()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ future returned by `non_sync_with_method_call` is not `Send` | = help: within `impl Future`, the trait `Send` is not implemented for `dyn std::fmt::Write` note: future is not `Send` as this value is used across an await --> $DIR/async-fn-nonsend.rs:49:15 | LL | let f: &mut std::fmt::Formatter = &mut get_formatter(); | --------------- has type `Formatter<'_>` which is not `Send` ... LL | fut().await; | ^^^^^ await occurs here, with `get_formatter()` maybe used later LL | } LL | } | - `get_formatter()` is later dropped here note: required by a bound in `assert_send` --> $DIR/async-fn-nonsend.rs:67:24 | LL | fn assert_send(_: impl Send) {} | ^^^^ required by this bound in `assert_send` error: future cannot be sent between threads safely --> $DIR/async-fn-nonsend.rs:76:17 | LL | assert_send(non_sync_with_method_call_panic()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future returned by `non_sync_with_method_call_panic` is not `Send` | = help: within `impl Future`, the trait `Send` is not implemented for `dyn std::fmt::Write` note: future is not `Send` as this value is used across an await --> $DIR/async-fn-nonsend.rs:56:15 | LL | let f: &mut std::fmt::Formatter = panic!(); | - has type `&mut Formatter<'_>` which is not `Send` LL | if non_sync().fmt(f).unwrap() == () { LL | fut().await; | ^^^^^ await occurs here, with `f` maybe used later LL | } LL | } | - `f` is later dropped here note: required by a bound in `assert_send` --> $DIR/async-fn-nonsend.rs:67:24 | LL | fn assert_send(_: impl Send) {} | ^^^^ required by this bound in `assert_send` error: future cannot be sent between threads safely --> $DIR/async-fn-nonsend.rs:78:17 | LL | assert_send(non_sync_with_method_call_infinite_loop()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future returned by `non_sync_with_method_call_infinite_loop` is not `Send` | = help: within `impl Future`, the trait `Send` is not implemented for `dyn std::fmt::Write` note: future is not `Send` as this value is used across an await --> $DIR/async-fn-nonsend.rs:63:15 | LL | let f: &mut std::fmt::Formatter = loop {}; | - has type `&mut Formatter<'_>` which is not `Send` LL | if non_sync().fmt(f).unwrap() == () { LL | fut().await; | ^^^^^ await occurs here, with `f` maybe used later LL | } LL | } | - `f` is later dropped here note: required by a bound in `assert_send` --> $DIR/async-fn-nonsend.rs:67:24 | LL | fn assert_send(_: impl Send) {} | ^^^^ required by this bound in `assert_send` error: aborting due to 5 previous errors