./gradlew bootRun

<https://repo.gradle.org/gradle/dist-snapshots/gradle-script-kotlin-3.5-20170217174236+0000-all.zip>

provideDelegate

java.lang.NoClassDefFoundError: kotlin/jvm/internal/Intrinsics

.idea

sealed class Seal(val b: String) {
  data class A(val a: String, b: String) : Seal(b)
}

Data class primary constructor must have only property parameters

sealed class Seal {
    abstract val b: String

    data class A(val a: String, override val b: String) : Seal()
}