IssueTracker

When creating a custom Application class, if you override onAttachBase() to be:

@Override
protected void attachBaseContext(Context base) {
  super.attachBaseContext(new ContextWrapper(base));
}

This causes ActivityThread to fail as it directly casts Application.getbaseContext() to a ContextImpl in handleReceiver():

ContextImpl context = (ContextImpl)app.getBaseContext();

https://github.com/android/platform_frameworks_base/blob/master/core/java/android/app/ActivityThread.java#L2692

Casts in handleStopService() and handleDestroyActivity are protected by an if (context instanceof ContextImpl) check and do not crash.

However, it may be possible that all three should instead use ContextImpl.getImpl(app) to unwrap an artibrary number of ContextWrappers: https://github.com/android/platform_frameworks_base/blob/master/core/java/android/app/ContextImpl.java#L188