I haven't been able to find the root cause yet, but it looks like some transitive dependencies are making R8 fails during obfuscation on the test apk. Here's the error I'm seeing in a sample repo:
```
AGPBI: {"kind":"error","text":"'java.lang.Object get(java.lang.Object)' and 'java.lang.Object create(java.lang.Object)' map to same name: 'a'","sources":[{}],"tool":"R8"}
AGPBI: {"kind":"error","text":"'void updatePreLayout(androidx.constraintlayout.widget.ConstraintLayout)' and 'void updatePostMeasure(androidx.constraintlayout.widget.ConstraintLayout)' map to same name: 'a'","sources":[{}],"tool":"R8"}
'java.lang.Object get(java.lang.Object)' and 'java.lang.Object create(java.lang.Object)' map to same name: 'a'
```

In my real project, the error has been surfaced by adding the Google Play core library to the project and resulted in the same exception but different error message:
```
'Lcom/google/android/play/core/appupdate/j;' because it is in conflict with an existing class with the same name. This usually happens when compiling a test application against a source application and having short generic names in the test application. Try giving 'Lcom/google/android/play/core/appupdate/j;' a more specific name or add a keep rule to keep 'com.google.android.play.core.appupdate.j'.
```

I've attached a repro sample. Simply unzip it and run `./gradlew connectedCheck` to reproduce the error.

Issue 149946708

Links (7)

Issue metadata