The short answer is that coroutines in Kotlin are ...

# coroutines

[elizarov]

The short answer is that coroutines in Kotlin are stackful in the same sense as in Quasar. Kotlin suspend fun are are direct analogue of Quasar’s @Suspendable (or throws SuspendExecution) functions and suspension can happen at any depth in the stack as long as the whole call chain is marked with suspend which is enforced by compiler (you cannot invoke suspending function from a regular one). Quasar enforces that too, but it is using throws SuspendExecution and Java checked exceptions logic for this purpose, which is a little bit weaker form of enforcement.