IssueTracker

Thanks for the report. Would it be possible for you to share the generated APK? If you prefer to share it privately you can send it to christofferqa@google.com or sgjesse@google.com.

Thanks for sharing the APK. I can confirm that the VerifyError is reproducible on api level 19 and below.

For the record, this effectively happens because there is a non-abstract class in the application which has a non-abstract method. Simply making the class abstract solves the problem.

I will investigate if there are any optimizations in R8 that introduce abstract methods without making the enclosing class abstract as well.

Chen, could you try to enable assertions and build with R8 version a9bd718ac704fedaef90329f378fd06aab11e0f2 by making the following changes to build.gradle?

  buildscript {
      repositories {
          maven {
              url "http://storage.googleapis.com/r8-releases/raw/master"
          }
      }
      dependencies {
          classpath 'com.android.tools:r8:a9bd718ac704fedaef90329f378fd06aab11e0f2'  // Must be before the Gradle Plugin for Android.
          classpath 'com.android.tools.build:gradle:X.Y.Z'     // Your current AGP version.
       }
  }

You can build with assertions enabled using the following command:
$ ./gradlew clean assembleRelease -Dorg.gradle.jvmargs="-ea:com.android.tools.r8... -Xmx1536m"

This should be fixed by https://r8-review.googlesource.com/c/r8/+/39220 and https://r8-review.googlesource.com/c/r8/+/39222, which both landed in R8 version 1.5.44.

You should be able to build with this version by making the following changes to build.gradle:

buildscript {
    repositories {
        maven {
            url 'http://storage.googleapis.com/r8-releases/raw'
        }
    }
    dependencies {
        classpath 'com.android.tools:r8:1.5.44'          // Must be before the Gradle Plugin for Android.
        classpath 'com.android.tools.build:gradle:X.Y.Z' // Your current AGP version.
     }
}

It works.
Thank you very much.

Great to hear, thanks for the confirmation!