def test_box_recursion(check_dump):
val = Value(0, 0, 0)
exp = Box('Box with itself inside', val)
exp.value = exp
with pytest.raises(RuntimeError):
exp.get()
if sys.version_info >= (3, 5):
exc_name = 'RecursionError'
else:
exc_name = 'RuntimeError'
check_dump(exp, """
Box with itself inside <{e} while getting value>: (&1)
Box with itself inside <{e} while getting value> (*1)
""".format(e=exc_name))
