// Poison the arg area with deterministic values.
//
//go:noinline
func poisonStack() [20]int {
	return [20]int{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}
}

func TestTracebackParentChildGoroutines(t *testing.T) {
	parent := fmt.Sprintf("goroutine %d", runtime.Goid())
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()
		buf := make([]byte, 1<<10)