Cython breaks passing kwargs to functions with one args

cyargs.py

from __future__ import print_function


def func_one_arg(a):
    print('one arg')


def func_one_kwarg(a=1):
    print('one kwarg')


def func_two_args(a, b):
    print('two args')


def func_two_kwargs(a=1, b=2):
    print('two kwargs')


func_one_arg(1)
func_one_kwarg(1)
func_two_args(1, 2)
func_two_kwargs(1, 2)

try:
    func_one_arg(a=1)
except:
    print('Failed to run func_one_arg(a=1)')
func_one_kwarg(a=1)
func_two_args(a=1, b=2)
func_two_kwargs(a=1, b=2)

result.log

Running uncythonized code
one arg
one kwarg
two args
two kwargs
one arg
one kwarg
two args
two kwargs

Running cythonized code
one arg
one kwarg
two args
two kwargs
Failed to run func_one_arg(a=1)
one kwarg
two args
two kwargs

run_cyargs.py

"""
cp cyargs.py cyargs2.py
cythonize cyargs2.py
gcc -shared -fPIC cyargs2.c -I/usr/local/include/python2.7 -o cyargs2.so -lpython2.7
python run_cyargs.py
"""
from __future__ import print_function

print('Running uncythonized code')
import cyargs
print()
print('Running cythonized code')
import cyargs2