I have a spring service with some injected values. But all injected values are nullwhen accessing them from a default parameter value.

Steps to reproduce

  1. Write a simple spring component (service)
  2. Set a default for an optional parameter and reference an injected (non-nullable) member property
  3. Call this method

Sample:

```kotlin @Service class MyService( val repo: MyRepository // Injected from Spring )

fun callDoSomething() { // repo is set when accessed from here println("Repo: $repo")

// works update(case = repo.getCase()) // works

// throws NPE on runtime update() }

fun doSomething(case: CaseBE = repo.getCase()) { // repo is null when accessed from parameter list // ... }


**Expected result:** 

Result of expression is assigned to parameter

**Actual result**: 

Null-pointer exception because all injected properties are null for `this`when evaluated as default parameter. Seems like the scope of the class is comlpletely lost which is highly unexpected.

It does not even work with an explictly scoped `this`:

```kotlin
fun doSomething(case: CaseBE = this@MyService.repo.getCase()) { // still NPE when accessing `repo`
  // ...
}

I even tried it with self-reference, same here:

```kotlin @Service class MyService( val repo: MyRepository // Injected from Spring, @Lazy self: MyService, // self-reference as attempted workaround )

fun callDoSomething() { // repo is set when accessed from here println("Repo: $repo")

// works update(case = repo.getCase()) // works

// throws NPE on runtime update() }

fun doSomething(case: CaseBE = self.repo.getCase()) { // repo is null when accessed from parameter list // ... } ````

I reported that issue to the Kotlin Team (https://youtrack.jetbrains.com/issue/KT-78600) but they immediately redirected me to here because they are convinced that this is an issue with Spring itself or the kotlin-spring plugin.

Thank you.