I have a code which looks like this ```class TeaMaker privat kotlinlang #announcements

class TeaMaker {
    private lateinit var tea: Tea

    fun prepareTea() {
        tea = Tea()
    }

    fun addSugar() {
        tea.add(Sugar())
    }
}

class Restaurant {
    ...
    //In some method
    val teaMaker = TeaMaker()

    teaMaker.prepareTea()
    teaMaker.addSugar()
}

The problem is when i call addSugar I get the lateinit not initialized exception. I tried setting up debugger but found it is initialised. Am I missing something?

arekolek

08/07/2019, 6:00 AM

In the real program, is this:

Copy code

teaMaker.prepareTea()
teaMaker.addSugar()

really done sequentially, or are there multiple threads? If there are, it could explain why the problem goes away when you attach debugger

👍 1

Dico

08/07/2019, 6:39 PM

What probably happened is this:

Tea()

returned

null

👍 1

When the compiler thought it never should

I've run into this issue before

The problem with it is that

lateinit

property is not fail-safe in this case and results in wrong error

👍 1

Try adding

!!

and see if error changes

Brandon Ward

08/16/2019, 2:43 PM

both of these functions have a

void

unit

return type, so I highly doubt

!!

will change anything.

Dico

08/16/2019, 5:39 PM

tea = Tea()!!

Ankur Gupta

08/18/2019, 7:44 AM

The problem was rather complex and related to lifecycle of activity in android. In the actual code I had view returned in prepareTea() method, the view wasn't not being fully inflated before accessing its property that's why it threw an exception.

What I did was make the property val instead of lateinit var to fix the error.