@InjectMenu gives not inflated Menu object #1961

@EActivity(R.layout.activity_main)
@OptionsMenu(R.menu.main_menu)
public class MainActivity extends AppCompatActivity {
    @InjectMenu
    void setMenu(Menu mainMenu) {
        //mainMenu is not inflated here!
    }
}

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.menu.main_menu, menu);
        {
            Menu mainMenu = null;
            mainMenu = menu;
            setMenu(mainMenu);
        }
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = getMenuInflater();
        {
            Menu mainMenu = null;
            mainMenu = menu;
            setMenu(mainMenu);
        }
        menuInflater.inflate(R.menu.main_menu, menu);
        return super.onCreateOptionsMenu(menu);
    }