Comment 5 for bug 1194410

I saw something like a regression in some case, or maybe I'm misusing the library:

>>> from io import BytesIO
>>> from lxml import etree
>>> xml='''<root>
... <child name='one' />
... <child name='two' />
... </root>
... '''
>>> document = etree.iterparse(BytesIO(xml), events=('end',), tag='root')
>>> for action, elem in document:
... print("%s: %s" % (action, elem.tag))
...
end: root
>>> file('/tmp/test.xml', 'w').write(xml)
>>> document = etree.iterparse('/tmp/test.xml', events=('end',), tag='root')
>>> for action, elem in document:
... print("%s: %s" % (action, elem.tag))
...
end: root
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "iterparse.pxi", line 478, in lxml.etree.iterparse.__next__ (src/lxml/lxml.etree.c:98432)
  File "iterparse.pxi", line 530, in lxml.etree.iterparse._read_more_events (src/lxml/lxml.etree.c:98953)
  File "parser.pxi", line 601, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:74863)
lxml.etree.XMLSyntaxError: None

Downgrading libxml2 version 2.7.8.dfsg-5.1ubuntu4 does not finish in a traceback when parsing from a file.