lxml segfault

outwit.py

from __future__ import print_function

from lxml import etree
from StringIO import StringIO


def coroutine(func):
    def start(*args, **kwargs):
        ret = func(*args, **kwargs)
        try:
            next(ret)
        except StopIteration:
            return None
        return ret
    return start


@coroutine
def yo_gen2(parent):
    with parent.element("yo"):
        while True:
            a = yield
            print(2, a)


@coroutine
def yo_gen(parent):
    with etree.xmlfile(parent) as xf:
        ret = yo_gen2(xf)
        while True:
            val = yield
            ret.send(val)


gen = yo_gen(StringIO())
gen.send("hellooo")
try:
    gen.throw(Exception())
except Exception as e:
    print(e)