element generator factory fails with accents and other valid utf-8 characters

[belitre]

If I add text to the builder including accents or other special characters it fails.

Samples

E("tag","garçon")
E("tag","fantástico")

Error

C:\Python27\lib\site-packages\lxml-3.4.4-py2.7-win32.egg\lxml\builder.pyc in __call__(self, tag, *children, **attrib)
    234 raise TypeError("bad argument type: %s(%r)" %
    235 (type(item).__name__, item))
--> 236 v = t(elem, item)
    237 if v:
    238 get(type(v))(elem, v)

C:\Python27\lib\site-packages\lxml-3.4.4-py2.7-win32.egg\lxml\builder.pyc in add_text(elem, item)
    183 elem[-1].tail = (elem[-1].tail or "") + item
    184 except IndexError:
--> 185 elem.text = (elem.text or "") + item
    186
    187 def add_cdata(elem, cdata):

C:\Python27\lib\site-packages\lxml-3.4.4-py2.7-win32.egg\lxml\etree.pyd in lxml.etree._Element.text.__set__ (src\lxml\lxml.etree.c:46353)()

C:\Python27\lib\site-packages\lxml-3.4.4-py2.7-win32.egg\lxml\etree.pyd in lxml.etree._setNodeText (src\lxml\lxml.etree.c:20953)()

C:\Python27\lib\site-packages\lxml-3.4.4-py2.7-win32.egg\lxml\etree.pyd in lxml.etree._createTextNode (src\lxml\lxml.etree.c:20829)()

C:\Python27\lib\site-packages\lxml-3.4.4-py2.7-win32.egg\lxml\etree.pyd in lxml.etree._utf8 (src\lxml\lxml.etree.c:27125)()

Version Info:

Python : sys.version_info(major=2, minor=7, micro=4, releaselevel='final', serial=0)
lxml.etree : (3, 4, 4, 0)
libxml used : (2, 9, 0)
libxml compiled : (2, 9, 0)
libxslt used : (1, 1, 28)
libxslt compiled : (1, 1, 28)

[scoder (scoder)]

Pass Unicode strings instead or switch to Python 3.