Crashes (nodejs) given invalid XML

[megawac]

var DOMParser = require("xmlshim").DOMParser;
var parser = new DOMParser();
var xml = parser.parseFromString("", 'text/xml');

Will crash node

> var DOMParser = require("xmlshim").DOMParser;
> var parser = new DOMParser();
> var xml = parser.parseFromString("", 'text/xml');
node: ../src/xml_sax_parser.cc:71: void libxmljs::XmlSaxParser::initializeContext(): Assertion `context_' failed.
[1]    1682 abort (core dumped)  node