Issue1047

Parsing with pulldom doesn't work on jython trunk:

>>> from xml.dom.pulldom import parseString
>>> list(parseString("<foo></foo>"))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/lsoto/src/jython.doj/jython/dist/Lib/xml/dom/pulldom.py",
line 231, in next
    rc = self.getEvent()
  File "/home/lsoto/src/jython.doj/jython/dist/Lib/xml/dom/pulldom.py",
line 285, in _emit
    rc = self.pulldom.firstEvent[1][0]
TypeError: 'NoneType' object is unsubscriptable

While I suspect that the root of the problem is the sax parser output
not conforming with what pulldom expects, changing DOMEventStream._emit
from:

    def _emit(self):
        """ Fallback replacement for getEvent() that emits
            the events that _slurp() read previously.
        """
        rc = self.pulldom.firstEvent[1][0]
        self.pulldom.firstEvent[1] = self.pulldom.firstEvent[1][1]
        return rc

To the following:

    def _emit(self):
        """ Fallback replacement for getEvent() that emits
            the events that _slurp() read previously.
        """
        if self.pulldom.firstEvent[1] is None:
            return None
        rc = self.pulldom.firstEvent[1][0]
        self.pulldom.firstEvent[1] = self.pulldom.firstEvent[1][1]
        return rc

*Seems* to work.

Workaround applied on r4836.

I think this need further investigation, thought.

Fixed in 2.5
Tested in test_minidom.testSAX2DOM