Kotlin bean instantiation regression with default declared constructor [SPR-15851]

[spring-projects-issues]

Lewis opened SPR-15851 and commented

#20232 is the original report of the issue.

With Spring Boot 2.0 M3:

@ConfigurationProperties("foo")
class FooProperties(
    var bar: String = "bar",
    var baz: Int = 1
)

Generates this stacktrace:

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.techdev.xyz.FooProperties]: No corresponding Kotlin constructor found
        at org.springframework.beans.BeanUtils$KotlinDelegate.instantiateClass(BeanUtils.java:742) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:165) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:88) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

---

Affects: 5.0 RC3

Issue Links:

• Kotlin class instantiation with optional parameters and default values [SPR-15673] #20232 Kotlin class instantiation with optional parameters and default values

Referenced from: commits ef175d7