warning: Supported source version 'RELEASE_7' from annotation processor 'org.jetbrains.kotlin.kapt3.ProcessorWrapper' less than -source '1.8'

Question

I get this error message when I compile with Android Studio 3.1 and Kotlin. What I need to configure to avoid this warning?

warning: Supported source version 'RELEASE_7' from annotation processor 'org.jetbrains.kotlin.kapt3.ProcessorWrapper' less than -source '1.8'

Answer 1

That warning is a bug, that happens when you use kapt instead of annotationProcessor on some libraries, for example Room on version: 1.0.0 (fixed by using version: 1.1.0-beta2).