<Kotlin Program Not Running> I have the following ...

# stackoverflow

[user]

Kotlin Program Not Running
I have the following kotlin code
fun main() {
println("How many mines do you want on the field?")
val mines = readln().toInt()
val minefield = Minefield(mines)...

However, once I enter a number, it doesn't do anything. When I attempted to debug it, I saw that it took mines in, but kept expecting something. There's no other readln() in the initializer, and the Minefield class signature is
class Minefield(mines: Int)

What's going wrong?