Program: 26255
Project: 26255
Buggy source:
@Override void fetchEvents(){
  final DateTime now=DateTime.now();
  int mStart=(int)(now.minusMonths(2).dayOfMonth().withMinimumValue().getMillis() / 1000);
  int mEnd=(int)(now.plusYears(1).dayOfMonth().withMaximumValue().getMillis() / 1000);
  setIsLoading(true);
  final String plusId=getArguments().getString(Const.EXTRA_PLUS_ID);
  final String cacheKey="String_Node_Str" + plusId;
  if (Utils.isOnline(getActivity())) {
    App.getInstance().getGroupDirectory().getChapterEventList(mStart,mEnd,plusId,new Callback<ArrayList<Event>>(){
      @Override public void success(      ArrayList<Event> events,      retrofit.client.Response response){
        mEvents.addAll(events);
        App.getInstance().getModelCache().putAsync(cacheKey,mEvents,DateTime.now().plusHours(2),new ModelCache.CachePutListener(){
          @Override public void onPutIntoCache(){
            mAdapter.addAll(mEvents);
            setIsLoading(false);
          }
        }
);
      }
      @Override public void failure(      RetrofitError error){
        onError(error);
      }
    }
);
  }
 else {
    App.getInstance().getModelCache().getAsync(cacheKey,false,new ModelCache.CacheListener(){
      @Override public void onGet(      Object item){
        ArrayList<Event> events=(ArrayList<Event>)item;
        mAdapter.addAll(events);
        setIsLoading(false);
        Snackbar snackbar=Snackbar.make(getView(),R.string.cached_content,Snackbar.LENGTH_SHORT);
        ColoredSnackBar.info(snackbar).show();
      }
      @Override public void onNotFound(      String key){
        setIsLoading(false);
        Snackbar snackbar=Snackbar.make(getView(),R.string.offline_alert,Snackbar.LENGTH_SHORT);
        ColoredSnackBar.alert(snackbar).show();
      }
    }
);
  }
}

Fixed version (ground truth):
@Override void fetchEvents(){
  final DateTime now=DateTime.now();
  int mStart=(int)(now.minusMonths(2).dayOfMonth().withMinimumValue().getMillis() / 1000);
  int mEnd=(int)(now.plusYears(1).dayOfMonth().withMaximumValue().getMillis() / 1000);
  setIsLoading(true);
  final String plusId=getArguments().getString(Const.EXTRA_PLUS_ID);
  final String cacheKey="String_Node_Str" + plusId;
  if (Utils.isOnline(getActivity())) {
    App.getInstance().getGroupDirectory().getChapterEventList(mStart,mEnd,plusId,new Callback<ArrayList<Event>>(){
      @Override public void success(      ArrayList<Event> events,      retrofit.client.Response response){
        mEvents.addAll(events);
        App.getInstance().getModelCache().putAsync(cacheKey,mEvents,DateTime.now().plusHours(2),new ModelCache.CachePutListener(){
          @Override public void onPutIntoCache(){
            mAdapter.addAll(mEvents);
            setIsLoading(false);
          }
        }
);
      }
      @Override public void failure(      RetrofitError error){
        onError(error);
      }
    }
);
  }
 else {
    App.getInstance().getModelCache().getAsync(cacheKey,false,new ModelCache.CacheListener(){
      @Override public void onGet(      Object item){
        if (checkValidCache(item)) {
          ArrayList<Event> events=(ArrayList<Event>)item;
          mAdapter.addAll(events);
          setIsLoading(false);
          Snackbar snackbar=Snackbar.make(getView(),R.string.cached_content,Snackbar.LENGTH_SHORT);
          ColoredSnackBar.info(snackbar).show();
        }
 else {
          App.getInstance().getModelCache().removeAsync(cacheKey);
        }
      }
      @Override public void onNotFound(      String key){
        setIsLoading(false);
        Snackbar snackbar=Snackbar.make(getView(),R.string.offline_alert,Snackbar.LENGTH_SHORT);
        ColoredSnackBar.alert(snackbar).show();
      }
    }
);
  }
}