Kotlin: Issue when mapping primitive parameters

I didn't have time to create a minimal example and compare Java/Kotlin but if you have a method like this:

Kotlin:

@Mapping(target = "nested.myFlag", source = "someFlag")
fun map(irrelevant: Source, Boolean someFlag): Target

Java:

public class Target {
  public Nested nested;
}

public class Nested {
  public Boolean myFlag;
}

Mapstruct will fail with:

Can't map parameter "boolean someFlag" to "Nested nested". Consider to declare/implement a mapping method: "Nested map(boolean value)".

1. The message isn't exactly correct, it should rather be: Can't map parameter "boolean someFlag" to "Boolean myFlag". Consider to declare/implement a mapping method: "Boolean map(boolean value)".
2. I would expect MapStruct to have no problem mapping a primitive boolean to a wrapper Boolean (might be related to Kotlin vs. Java Boolean)
3. If I'm not mistaken, this works when both booleans are in the source/target objects but not when the source boolean is a method parameter

This does not work:

fun map(boolean: Boolean): Boolean? = boolean

Workaround (nullable Boolean):

@Mapping(target = "nested.myFlag", source = "someFlag")
fun map(irrelevant: Source, Boolean? someFlag): Target

Inizia riproducendo la firma del mapper Kotlin con un parametro Boolean primitivo e confrontala con il caso Java equivalente descritto nell’issue. Conferma se il parametro viene risolto nella destinazione Boolean annidata e se la diagnostica indica Boolean myFlag; il lavoro è completato quando il comportamento e il messaggio di errore corrispondono al mapping da primitivo a wrapper previsto.