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lateinit cannot be used with primitive types

 
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From the Kotlin reference:

The [lateinit] modifier can only be used on var properties declared inside the body of a class (not in the primary constructor), and only when the property does not have a custom getter or setter. The type of the property must be non-null, and it must not be a primitive type.



Any idea as to why this might be? I can't think of a valid reason, and it doesn't seem explained on that page.
 
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