Infinite loop with some documents

[hellodword]

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title type="html">
      Less: &lt;em> &amp;lt; &lt;/em>
  </title>
</feed>

or

<a><b>></b></a>

	var a struct {
		XMLName xml.Name
	}

	err := xml.Unmarshal([]byte(s), &a)
	fmt.Println(err)

It works with encoding/xml.

[hellodword]

func (d *Decoder) Token() (Token, error) may return nil, nil with some documents.

[hellodword]

xml/xml.go

Lines 1035 to 1038 in a78369b

	// This occurs only for an unquoted attr name.
	if b == '>' && !cdata && quote < 0 { // Possible end of tag reached
	d.ungetc('>') // Leaving end of tag available
	break // returning text

[hellodword]

@ydnar I noticed that you're opening a PR in golang/go, so I think I should keep this issue open :)

Because I confirmed the issue is still there, with the latest github.com/nbio/xml and Go 1.22.2