A fragment that crashes on recreation

CrashingFragment.kt

class MainActivity : AppCompatActivity() {
	
  val mainFragment = MainFragment("Ready to crash")
	
  override fun onCreate(savedInstanceState: Bundle?) {
    // the usual stuff
    supportFragmentManager.beginTransaction()
	.add(R.layout.fragmentContainerView, mainFragment)
	.commit()	
    }
}

class MainFragment(val textToDisplay: String) : Fragment() {
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     // Logic related to using $textToDisplay
   }
}