I have caught `kotlin.TypeCastException` while using coroutine’s `async/await` in `common` when runn...

# multiplatform

[pandawarrior]

I have caught kotlin.TypeCastException while using coroutine’s async/await in common when running on iOS. But it works well on Android. Any advice to go about this?

[svyatoslav.scherbina]

https://github.com/Kotlin/kotlinx.coroutines/issues/920

[pandawarrior]

Thanks, I saw the closed issue about using delay caused TypeCastException but it is actually IllegalStateException because the dispatcher doesn’t implement the Delay interface.

So we will have to implement the Deferred<Unit> (Generic is not available K/N) in to a custom dispatcher class?

Are there any examples to go about it?

[svyatoslav.scherbina]

Thanks, I saw the closed issue about using delay caused TypeCastException but it is actually IllegalStateException because the dispatcher doesn’t implement the Delay interface.

Could you clarify, do you encounter TypeCastException or IllegalStateException?

So we will have to implement the Deferred<Unit> (Generic is not available K/N) in to a custom dispatcher class?

How is Deferred related?

[pandawarrior]

>> Could you clarify, do you encounter TypeCastException or IllegalStateException?

I encountered kotlin.TypeCastException when using async/await in commonMain

>> How is Deferred related?

https://github.com/Kotlin/kotlinx.coroutines/issues/470, The temporary solution to solving TypeCastException for using delay is to implement Delay to the class subclassing CoroutineDispatcher(). So if I am not mistaken, the problem to TypeCastException to using async/await is the implementation of the Deferred interface in class that subclass CoroutineDispatcher().

[svyatoslav.scherbina]

Do you mean Deferred or Delay?

Are there any examples to go about it?

I believe there is one in the comments to the issue.