If value in value class is nullable and the argument definition is non-null, deserialization fails by NoSuchMethodException when using default arguments.

[k163377]

The problem occurs when deserializing the following D with default arguments.

@JvmInline
value class NullableObject(val v: String?)

data class D(val v: NullableObject = NullableObject(""))

The cause is that the arguments of the default function generated in such cases are different from those of the normal default function.
What actually happens is described below.
https://youtrack.jetbrains.com/issue/KTIJ-24354

[k163377]

Same issue https://youtrack.jetbrains.com/issue/KT-57357