Compilation error for `viz-core` on v0.7.0

[Totodore]

When trying to compile viz-core:

error: future cannot be sent between threads safely
  --> /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/viz-core-0.7.0/src/handler/after.rs:27:48
   |
27 |       async fn call(&self, i: I) -> Self::Output {
   |  ________________________________________________^
28 | |         self.f.call(self.h.call(i).await).await
29 | |     }
   | |_____^ future created by async block is not `Send`
   |
note: future is not `Send` as this value is used across an await
  --> /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/viz-core-0.7.0/src/handler/after.rs:28:43
   |
28 |         self.f.call(self.h.call(i).await).await
   |                     --------------------  ^^^^^ await occurs here, with `self.h.call(i).await` maybe used later
   |                     |
   |                     has type `std::result::Result<O, error::Error>` which is not `Send`
29 |     }
   |     - `self.h.call(i).await` is later dropped here
   = note: required for the cast from `Pin<Box<...>>` to `Pin<Box<dyn Future<Output = Result<O, Error>> + Send>>`
   = note: the full name for the source type has been written to '/root/repos/socketioxide/target/debug/deps/viz_core-fd165c2c8ce6133a.long-type-12905923365472627885.txt'
   = note: the full name for the target type has been written to '/root/repos/socketioxide/target/debug/deps/viz_core-fd165c2c8ce6133a.long-type-15852316088634765815.txt'
help: consider further restricting type parameter `O`
   |
23 |     F: Handler<Result<O>, Output = Result<O>> + Clone, O: std::marker::Send
   |                                                      ~~~~~~~~~~~~~~~~~~~~~~

Adding a Send bound here on the O generic seems to resolve the issue :

#[async_trait]
impl<H, F, I, O> Handler<I> for After<H, F>
where
    I: Send + 'static,
    H: Handler<I, Output = Result<O>> + Clone,
    F: Handler<Result<O>, Output = Result<O>> + Clone,
    O: Send + 'static,
{
    type Output = F::Output;

    async fn call(&self, i: I) -> Self::Output {
        self.f.call(self.h.call(i).await).await
    }
}

[fundon]

Interesting. how it doesn't show up under stable or nightly on my env?

[fundon]

0.7.1 has be released.

But on my local, the problem cannot be reproduced.

Thank you for the feedback.