How to show “@coroutine#2”,“@coroutine#3”,“@coroutine#1” in kotlin coroutine?

Question

import kotlinx.coroutines.*

fun log(msg: String) = println("[${Thread.currentThread().name}] $msg")

fun main() = runBlocking<Unit> {
    val a = async {
        log("I'm computing a piece of the answer")
        6
    }
    val b = async {
        log("I'm computing another piece of the answer")
        7
    }
    log("The answer is ${a.await() * b.await()}")    
}

Document of kotlin

[main @coroutine#2] I'm computing a piece of the answer [main @coroutine#3] I'm computing another piece of the answer [main @coroutine#1] The answer is 42

My IDE of Intellij IDEA and Android

[main] I'm computing a piece of the answer [main] I'm computing another piece of the answer [main] The answer is 42

How to show "@coroutine#2","@coroutine#3","@coroutine#1"????

Answer 1

Open Run/Debug Configurations window and add -Dkotlinx.coroutines.debug to the VM options :

After doing that you'll get this output:

[main @coroutine#2] I'm computing a piece of the answer
[main @coroutine#3] I'm computing another piece of the answer
[main @coroutine#1] : The answer is 42