Using the sample code does not reproduce the problem

[Vixb1122]

See: https:/Kotlin/kotlinx.coroutines/blob/master/coroutines-guide.md#the-problem

Note: if you have an old system with 2 or fewer CPUs, then you will consistently see 1000000, because CommonPool is running in only one thread in this case. To reproduce the problem you'll need to make the following change:

val mtContext = newFixedThreadPoolContext(2, "mtPool") // explicitly define context with two threads
var counter = 0

fun main(args: Array<String>) = runBlocking<Unit> {
    massiveRun(mtContext) { // use it instead of CommonPool in this sample and below 
        counter++
    }
    println("Counter = $counter")
}

I will not consitently see 1000000.

outputs:

Completed 1000000 actions in 25 ms
Counter = 892791

Completed 1000000 actions in 26 ms
Counter = 862276

Completed 1000000 actions in 29 ms
Counter = 881049

[elizarov]

It will be fixed when we implement our own implementation for DefaultDispatcher instead of CommonPool.