Try to write a command bot, got a long error.

[Jason5Lee]

I tried to write a command bot that is similar to this example. Then I got a long compile error.

the trait bound `fn(teloxide::prelude::AutoSend<teloxide::Bot>, teloxide::prelude::Message, Command) -> impl std::future::Future<Output = std::result::Result<(), std::boxed::Box<(dyn std::error::Error + std::marker::Send + std::marker::Sync + 'static)>>> {answer}: teloxide::dptree::di::Injectable<teloxide::prelude2::DependencyMap, std::result::Result<(), _>, _>` is not satisfied

[Jason5Lee]

My function has the exactly signature

async fn answer(
    bot: AutoSend<Bot>,
    message: Message,
    command: Command,
) -> Result<(), Box<dyn Error + Send + Sync>>

Where Command has #[derive(BotCommand, Clone)].

My implementation has a compilation error while the example passes the compilation, and I have absolutely no clue why.

[Jason5Lee]

Find the reason. Because the implementation of answer has a non-Sync value across await.