Binds optional

Hello. Thank you so much for developing/maintaining Dagger2. I have a problem with @BindsOptionalOf. Here is a primitive example of code https://gist.github.com/dmitro-ivanov/e03493211ebf0151cfebc5a6062b0a83. As I could see from the documentation it is legal to inject Optional<IRepository>, but at compile-time, I have the issue error: incompatible types: Optional<Object> cannot be converted to Optional<IRepository> Because the generated method injectMainActivity is using Optional.empty() without explicit specifying type. A workaround that helps is that inject-field should be Provider<Optional<IRepository>>.

Am I doing something illegal? or it is a bug?

[danysantiago]

Not the Dagger version, the ‘java source version’ also known as ‘target version’.

In an Android project this is usually found in the android closure, like this:

android {
    // ...
    compileOptions {
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }
}

It can also be manually configured using the Kotlin plugin:

kotlinOptions {
    jvmTarget = "1.8"
  }

Also, what version of Kotlin are you using?

[dmytroivanovv]

I did not specify jvmTarget. When I added

kotlinOptions {
        jvmTarget = "1.8"
    }

Everything works fine. There is no more problem. Thank you. Maybe it will be useful for someone.