Warning: "Safe call on a non-null receiver will have nullable type in future releases" due to nullable variable in buildvariants

Question

I'm developing an android app using Kotlin. I have two different build-variants - VariantA and VariantB - both containing a configuration-File:

// VariantA
object ConfigEnvironment {
    val SOME_PARAMETER: String? = null
}

// VariantB
object ConfigEnvironment {
    val SOME_PARAMETER: String = "This is a config"
}

In my code i'm calling:

ConfigEnvironment.SOME_PARAMETER?.let { Log.d("tag", "$it" }

When building VariantB the Compiler throws a warning:

Safe call on a non-null receiver will have nullable type in future releases

While this is correct for this variant, it's somewhat impractical - since i need the nullability in the other variant.

Can i safely supress this lint? (And how do i do that? My IDE didn't suggest any fixes)

Answer 1

It should be safe to suppress this warning since you do not call something which expects a non-nullable expression for it inside the let.

You can suppress the warnung like this:

@Suppress("UNNECESSARY_SAFE_CALL")
ConfigEnvironment.SOME_PARAMETER?.let { Log.d("tag", "$it") }

IntelliJ can help you with that. Just move the cursor to the ?. and type your shortcut for Quick Fix (you can look it up in the Keyboard settings):