Parcelize: Always map primitive array element types as boxed types for Array<T> (#KT-23808)

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/serializers/ParcelSerializer.kt

@@ -113,7 +113,7 @@ interface ParcelSerializer {
 
                 asmType.sort == Type.ARRAY -> {
                     val elementType = type.builtIns.getArrayElementType(type)
-                    val elementSerializer = get(elementType, typeMapper.mapTypeSafe(elementType, forceBoxed = false), context, strict = strict())
+                    val elementSerializer = get(elementType, typeMapper.mapTypeSafe(elementType, forceBoxed = true), context, strict = strict())
 
                     wrapToNullAwareIfNeeded(type, ArrayParcelSerializer(asmType, elementSerializer))
                 }

plugins/android-extensions/android-extensions-compiler/test/org/jetbrains/android/parcel/ParcelBoxTest.kt

@@ -55,6 +55,7 @@ class ParcelBoxTest : AbstractParcelBoxTest() {
     fun testCustomSerializerBoxing() = doTest("customSerializerBoxing")
     fun testKt20717() = doTest("kt20717")
     fun testEnumObject() = doTest("enumObject")
+    fun testIntArray() = doTest("intArray")
 }
 
 class ParcelBoxTestWithSerializableLikeExtension : AbstractParcelBoxTest() {

plugins/android-extensions/android-extensions-compiler/testData/parcel/box/intArray.kt

@@ -0,0 +1,38 @@
+// WITH_RUNTIME
+
+@file:JvmName("TestKt")
+package test
+
+import kotlinx.android.parcel.*
+import android.os.Parcel
+import android.os.Parcelable
+import java.util.Arrays
+
+@Parcelize
+data class Film(val genres: Array<Int>) : Parcelable {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as Film
+
+        if (!Arrays.equals(genres, other.genres)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        return Arrays.hashCode(genres)
+    }
+}
+
+fun box() = parcelTest { parcel ->
+    val film = Film(arrayOf(3, 5, 7))
+    film.writeToParcel(parcel, 0)
+
+    val bytes = parcel.marshall()
+    parcel.unmarshall(bytes, 0, bytes.size)
+
+    val film2 = readFromParcel<Film>(parcel)
+    assert(film == film2)
+}