IssueTracker

Code as below:

#java
package androidx.lifecycle;
public abstract class ViewModel {
    @SuppressWarnings("WeakerAccess")
    protected void onCleared() {
    }
   
    @MainThread
    final void clear() {
        //....
        onCleared();
    }
}

#kotlin
package sg.bigo.live.gift.newpanel.xxxx

open class BaseViewModel : ViewModel()
abstract class BaseViewModelExt : BaseViewModel()
class GiftPanelMultiMicViewModel : BaseViewModelExt() { 
    fun clear() { // <<----- HERE
        TraceLog.i(TAG, "clear")
    }
}

After optimise by R8. GiftPanelMultiMicViewModel will be

public final class i extends c {
    
    @Override // <<---- HERE clear method has @Override annotation
    public final void clear() { 
        TraceLog.i("gift_tag_panel_mic", "clear");
        //....
    }
}

Reproduce sample see mydump.zip, and optimise shell command

java -jar r8-8.6.27.jar --pg-compat --release program.jar --output out.jar --lib library.jar --classpath classpath.jar --pg-conf proguard.config --pg-map-output out.jar.map --min-api 21