I've been getting this exception whilst trying to decode any class with fields with type arguments: ...

# serialization

[rad]

I've been getting this exception whilst trying to decode any class with fields with type arguments:

java.lang.AbstractMethodError: 'kotlinx.serialization.KSerializer[] kotlinx.serialization.internal.GeneratedSerializer.typeParametersSerializers()'

Full stacktrace: https://pastes.dev/UaaPnH2ZPY

My code:

@Serializable
@SerialName("data")
public data class DataMatcher(
  public val predicate: Map<String, String>
) : ServerMatcher { ... }

where ServerMatcher is a sealed serializable interface.

I'm using 1.8.1.

[Artem Kobzar]

@sandwwraith ^^

[Artem Kobzar]

I have the same with Spring Boot

[Artem Kobzar]

But even for a simple class like this:

@Serializable
@kotlin.js.JsExport
data class OwnerFieldsDto(
    val firstName: String,
    val lastName: String,
    val address: String,
    val city: String,
    val telephone: String
)

[sandwwraith]

You have 1.7.x somewhere in your classpath. Try to force 1.8.1 dependency version.
https://github.com/Kotlin/kotlinx.serialization/issues/2968