[GROOVY-5867] xml:lang attribute appears to break StreamingMarkupBuilder >= 2.0.6

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.6, 2.1.0-beta-1
• Fix Version/s: 2.1.0-rc-1, 2.0.7
• Component/s: XML Processing
• Environment: java version "1.7.0_09"; Java(TM) SE Runtime Environment (build 1.7.0_09-b05); Java HotSpot(TM) 64-Bit Server VM (build 23.5-b02, mixed mode)
• Assignee: Paul King
• Reporter: David Huggins Daines
• Created: 28/Dec/12 17:10
• Updated: 12/Jan/13 20:40
• Resolved: 04/Jan/13 04:28

Description

When using XmlSlurper to parse XML containing an xml:lang attribute and trying to write out this XML using StreamingMarkupBuilder, I get this error in 2.0.6 and 2.1.0-beta-1, which I didn't get in 2.0.5:

[Fatal Error] :1:19: Attribute name "xml:" associated with an element type "tag0:grammar" must be followed by the ' = ' character.
ERROR:  'Attribute name "xml:" associated with an element type "tag0:grammar" must be followed by the ' = ' character.'
Caught: groovy.lang.GroovyRuntimeException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 19; Attribute name "xml:" associated with an element type "tag0:grammar" must be followed by the ' = ' character.
groovy.lang.GroovyRuntimeException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 19; Attribute name "xml:" associated with an element type "tag0:grammar" must be followed by the ' = ' character.
	at broken-groovy-test$_run_closure2.doCall(broken-groovy-test.groovy:8)
	at broken-groovy-test.run(broken-groovy-test.groovy:8)

The groovy code in question is:

import groovy.xml.StreamingMarkupBuilder;
import groovy.xml.XmlUtil;

def grammar = new XmlSlurper().parse(new File(args[0]))
def builder = new StreamingMarkupBuilder()
def copier = builder.bind { mkp.yield(grammar) };
processedFile = new File("test-out.xml")
processedFile.withWriter{ it << XmlUtil.serialize(copier) } 

And the XML that makes it fail is:

<?xml version="1.0" encoding="UTF-8"?>
<grammar xml:lang="en-us" xmlns="http://www.w3.org/2001/06/grammar">
</grammar>