xml2lua.toXml() is not parsing tag attributes correctly

[evandrofisico]

Reading a existing XML file, parsing and outputting it sometimes still results in adding <_attr></_attr> instead of adding the attributes to the tag.
Example:
local xml = xml2lua.loadFile(xmlfile)
local parser = xml2lua.parser(handler)
parser:parse(xml)
print(xml2lua.toXml(handler.root))

In the input XML:
2

In the output XML:
2
<_attr>
static
</_attr>

vm.xml.gz

[Manoel Campos]

It's just a printing issue, right?
Because the lua table will always have _attr fields if the XML has tag attributes.

[evandrofisico]

The generated table does have the _attr field, but it is moved and appears as a child node instead. So just reading a file, parsing it as a table and outputting it produces a different (and invalid) xml from the original. I believe the expected behavior would be that reading, parsing and outputting should produce the same data as the input, right?
Attached are a sample program and xml file showing the behaviour.
bug.tar.gz

[Manoel Campos]

You're right. I'll take a look at it. Thanks for reporting.

[Manoel Campos]

I used a smaller XML to make it easier to debug.

<?xml version="1.0"?>
<domain type="xen">
  <on_crash>restart</on_crash>
  <clock offset="utc" adjustment="reset"/>
  <memory unit="KiB">16777216</memory>
</domain>

Indeed, it's just an issue with the xml2lua.toXml() method.