Testing recursive suspend functions

MainActivity.kt

package gmk57.testrecursive

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlinx.coroutines.yield
import kotlin.concurrent.thread

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        thread { testStackDepth1(1) }
        lifecycleScope.launch(Dispatchers.IO) { testStackDepth2(1) }
        lifecycleScope.launch(Dispatchers.IO) { testStackDepth3(1) }
//        lifecycleScope.launch(Dispatchers.IO) { testStackDepth4(1) }
    }

    private fun testStackDepth1(count: Int) {
        if (count % 1000 == 0) println("testStackDepth1: $count")
        try {
            testStackDepth1(count + 1)
        } catch (e: StackOverflowError) {
            println("testStackDepth1 max: $count")
        }
    }

    private suspend fun testStackDepth2(count: Int) {
        if (count % 1000 == 0) println("testStackDepth2: $count")
        try {
            testStackDepth2(count + 1)
        } catch (e: StackOverflowError) {
            println("testStackDepth2 max: $count")
        }
    }

    private suspend fun testStackDepth3(count: Int) {
        if (count % 1000 == 0) println("testStackDepth3: $count")
        try {
            yield()
            testStackDepth3(count + 1)
        } catch (e: StackOverflowError) {
            println("testStackDepth3 max: $count")
        }
    }

    private suspend fun testStackDepth4(count: Int) {
        if (count % 1000 == 0) println("testStackDepth4: $count")
        try {
            delay(1)
            testStackDepth4(count + 1)
        } catch (e: StackOverflowError) {
            println("testStackDepth4 max: $count")
        }
    }
}