Flask and Flask-Babel Exception (simplified)

test.py

from flask.ext.babel import lazy_gettext
import os
import pickle

text = lazy_gettext('foo')
pickle.dump(text, open('lazy.string', 'wb'))
broken = pickle.load(open('lazy.string', 'rb'))
os.remove('lazy.string')
broken._kwargs  # Traceback ... RuntimeError: maximum recursion depth exceeded while calling a Python object