reproducible

Here is code sample to copy into the editor:

 public Object get(String input, char c) {
        Object parsed = null;
        if (input != null) {
            switch (c) {
                case 'a':
                    parsed = Integer.parseInt(input);
                    break;
                default:
                    throw new RuntimeException();
            }
        }
        return parsed;
    }

Not a deficiency of the algorithm / approach

Fixed in experimental impl; wait for the umbrella issue to close.