async dyn Trait type deduction

[no111u3]

For standart functions rust deduct conversion from Box::new(something) to Box<dyn Trait_name>, but in async we need use as Box<dyn Trait_name>:

pub trait Trait: Send {}

#[derive(Default)]
struct Test;

impl Trait for Test {}

pub fn test() -> Box<dyn Trait> {
    Box::new(Test::default())
}

pub async fn test_async() -> Box<dyn Trait> {
    Box::new(Test::default()) as Box<dyn Trait>
}

So I think it's may be better without as Box...

[memoryruins]

Duplicate of #60424