error: future cannot be sent between threads safely
  --> tests/ui/consider-restricting.rs:16:5
   |
16 |     async fn publish<T: IntoUrl>(&self, _url: T) {}
   |     ^^^^^ future created by async block is not `Send`
   |
note: captured value is not `Send`
  --> tests/ui/consider-restricting.rs:16:41
   |
16 |     async fn publish<T: IntoUrl>(&self, _url: T) {}
   |                                         ^^^^ has type `T` which is not `Send`
   = note: required for the cast from `Pin<Box<{async block@$DIR/tests/ui/consider-restricting.rs:16:5: 16:10}>>` to `Pin<Box<dyn Future<Output = ()> + Send>>`
help: consider further restricting type parameter `T` with trait `Send`
   |
16 |     async fn publish<T: IntoUrl + std::marker::Send>(&self, _url: T) {}
   |                                 +++++++++++++++++++

error: future cannot be sent between threads safely
  --> tests/ui/consider-restricting.rs:23:5
   |
23 |     async fn publish<T>(&self, _url: T) {}
   |     ^^^^^ future created by async block is not `Send`
   |
note: captured value is not `Send`
  --> tests/ui/consider-restricting.rs:23:32
   |
23 |     async fn publish<T>(&self, _url: T) {}
   |                                ^^^^ has type `T` which is not `Send`
   = note: required for the cast from `Pin<Box<{async block@$DIR/tests/ui/consider-restricting.rs:23:5: 23:10}>>` to `Pin<Box<dyn Future<Output = ()> + Send>>`
help: consider further restricting type parameter `T` with trait `Send`
   |
23 |     async fn publish<T + std::marker::Send>(&self, _url: T) {}
   |                        +++++++++++++++++++