com.android.tools.r8.CompilationFailedException:Compilation failed to complete, position:Lcom/facebo-CodePudding

I have some error, after updated kotlin version (ext.kotlin_version) to 1.6.10:

com.android.tools.r8.internal.E00: Unexpected type in conversion to primitive: OBJECT

Execution failed for task ':app:minifyReleaseWithR8'.
> com.android.tools.r8.CompilationFailedException: Compilation failed to complete, position: Lcom/facebook/login/DefaultAudience$EnumUnboxingLocalUtility;getNativeProtocolAudience(I)Ljava/lang/String;, origin: ..\.gradle\caches\transforms-3\57102c4e3d32396b86898e5ca0dd620d\transformed\jetified-facebook-core-7.1.0-runtime.jar:com/facebook/login/DefaultAudience.class

It happened, if I use options minifyEnabled true in my build.gradle(:app) with Generate signed bundle. If I use old ext.kotlin_version (for examle, 1.5.0) this error did not appear.

I think, if I use correct rule(s) in proguard-rules.pro I could resolve this issue.

CodePudding user response：

I find right rule for decide this problem. You need add this code into proguard-rules.pro:

-keep class com.facebook.login.** {*;}

This line let ignore option minifyEnabled true for all files into com.facebook.login package.

CodePudding user response：

This was caused by an issue in R8. Fix is available in R8 3.1.67, 3.2.50 and will soon be in a 3.3.x-dev version.

Add the following to settings.gradle or settings.gradle.kts to use a specific version of R8 different from the one bundeled with AGP:

pluginManagement {
    buildscript {
        repositories {
            mavenCentral()
            maven {
                url = uri("https://storage.googleapis.com/r8-releases/raw")
            }
        }
        dependencies {
            classpath("com.android.tools:r8:X.Y.Z")
            classpath('com.google.guava:guava:30.1.1-jre')  // <-- THIS IS REQUIRED UNTIL R8 3.2.4-dev
        }
    }
}