Why I still get "Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6"

Question

I am developing an Android project with Kotlin and Dagger 2. I have a NetworkModule it is supposed to provide a singleton instance of Retrofit. In which I define all those provider functions.

All code snippet below are inside NetworkModule :

@Module
object NetworkModule {
   ...
}

I want to provide HttpRequestInterceptor , this is what I tried:

@Provides
@JvmStatic
internal fun provideHttpRequestInterceptor(): Interceptor {
    // compiler error: Cannot inline bytecode built with JVM target 1.8 into 
    // bytecode that is being built with JVM target 1.6, 
    // please specify proper '-jvm-target' option

    return Interceptor { chain ->
        val original = chain.request()
        val requestBuilder = original.newBuilder()
        val request = requestBuilder.build()
        chain.proceed(request)
    }
}

But the above code always give me this compiler error: Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6, please specify proper '-jvm-target' option

In my build.gradle I have specified:

android {
   ...
   compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

I have two questions now:

What is built with jvm 1.6 and 1.8 respectively? How this could happen (please use example to explain) ?
As you can see in my build.gradle I already declared build target is JVM 1.8. Why I still get this error?

https://stackoverflow.com/a/60246275/4694013 – Anoop M Maddasseri Feb 16 '20 at 07:21 — Anoop M Maddasseri, Feb 16 '20 at 07:21

score 19 · Accepted Answer · answered Dec 26 '19 at 13:15

19

Add kotlinOptions and set jvmTarget to 1.8 in your build.gradle file to resolve the problem

kotlinOptions {
    jvmTarget = "1.8"
}

answered Dec 26 '19 at 13:15

Md. Asaduzzaman

13,121
2
19
34

Could you please also give an answer for my 1st question? – user842225 Dec 26 '19 at 13:29
*Calls to static methods in Java interfaces are prohibited in JVM target 1.6*. So you can't use it in 1.6. You have to use 1.8. – Md. Asaduzzaman Dec 26 '19 at 13:32
Thanks, could you please also take a look at my another question : https://stackoverflow.com/questions/59489252/the-annotation-for-provider-function-of-dagger-module-class – user842225 Dec 26 '19 at 13:40
1

you will never know how you saved me from killing myself – Tonnie Jul 02 '20 at 14:30
I put this inside "android" in the app build.gradle. – Amber Jul 04 '20 at 22:35
I have this set in Android Studio's settings, but I'm still getting the error. I've rebuilt and restarted... no dice. – Oscar Jul 05 '20 at 23:37
@Oscar, This is not related to *Android Studio's settings*. You have to add this inside **APP** level `build.gradle` file – Md. Asaduzzaman Jul 06 '20 at 04:29
@Md.Asaduzzaman Thanks, but then what’s the meaning of the “Target JVM version” in Android’s Kotlin compiler settings? – Oscar Jul 07 '20 at 09:24
@Md.Asaduzzaman It turns out that this is a bug in Android Studio, which is being addressed. – Oscar Jul 17 '20 at 23:02
An explanation, or at least a lead to any theoretical course would have been appreciated. – mgueydan Dec 23 '20 at 22:26

Why I still get "Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6"

1 Answers1

Linked