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

まず、プリミティブな Boolean パラメーターを持つ Kotlin mapper のシグネチャーを再現し、issue で説明されている同等の Java ケースと比較します。パラメーターがネストされた Boolean のターゲットに解決されるか、また診断が Boolean myFlag を示すかを確認します。完了とは、動作とエラーメッセージが期待されるプリミティブからラッパーへのマッピングと一致することです。