Conflict with lazy staic

[jiashiwen]

Hi

My lazy_static code is:

lazy_static::lazy_static! {
    static ref GLOBALE_CASBIN_ENFORCER: AsyncOnce<RwLock<CasbinEnforcer>> = AsyncOnce::new(async {
        let ce=CasbinEnforcer::default().await;
        RwLock::new(ce)
    });
}

when i add dependence rsa to my Cargo.yml

[dependencies]
rsa = "0.7.1"

I got Errors

`*const futures_locks::RwLock<CasbinEnforcer>` cannot be sent between threads safely
the trait `std::marker::Send` is not implemented for `*const futures_locks::RwLock<CasbinEnforcer>`
the trait `std::marker::Send` is implemented for `futures_locks::RwLock<T>`
required because of the requirements on the impl of `std::marker::Send` for `Cell<*const futures_locks::RwLock<CasbinEnforcer>>`
required because of the requirements on the impl of `Sync` for `spin::once::Once<AsyncOnce<futures_locks::RwLock<CasbinEnforcer>>>`
shared static variables must have a type that implements `Sync`

`(dyn futures::Future<Output = futures_locks::RwLock<CasbinEnforcer>> + 'static)` cannot be sent between threads safely
the trait `std::marker::Send` is not implemented for `(dyn futures::Future<Output = futures_locks::RwLock<CasbinEnforcer>> + 'static)`
required because of the requirements on the impl of `std::marker::Send` for `Unique<(dyn futures::Future<Output = futures_locks::RwLock<CasbinEnforcer>> + 'static)>`
required because of the requirements on the impl of `std::marker::Send` for `std::sync::Mutex<std::result::Result<futures_locks::RwLock<CasbinEnforcer>, Pin<Box<(dyn futures::Future<Output = futures_locks::RwLock<CasbinEnforcer>> + 'static)>>>>`
required because of the requirements on the impl of `Sync` for `spin::once::Once<AsyncOnce<futures_locks::RwLock<CasbinEnforcer>>>`
shared static variables must have a type that implements `Sync`

Perhaps there is some kind of conflict between the use of future and lazy static in ras

[dignifiedquire]

The issue is one about thread saftey, which is required for lazy_static to work in this case. But none of the types in the errors have a reference to this crate rsa.

[jiashiwen]

I will give lazy_static a issue