`async and produce ... are relying on the user to ...

# coroutines

[aaverin]

async and produce ... are relying on the user to consume the final exception – what if user doesn’t consume final exception, will it be thrown out of async/produce or just quietely hidden?

[gildor]

quietely hidden
Someone always should handle Deferred result.
Otherwise use launch which do not wrap extensions and just throw them (as threads)

[aaverin]

Still didn’t get it.
If I call

myDeferredCourotine.await()

and it throws an exception inside, will I see it?

[gildor]

Yes

[gildor]

await() will throw an exception if code inside of myDeferredCourotine threw it

[gildor]

but only when you call await()

[gildor]

in case of launch code will throw just a global uncaught exception, same as any error in a separate thread and you cannot catch it from outside (cannot wrap launch to try or launchedCoroutine.join(), only code inside of launch)