"org.testng.TestNGException: java.lang.NullPointerException" when classes defined in "suite" level

[GoogleCodeExporter]

1) Define TestClassWithGroups.java test class and add test method with  'AAA' 
group and run this suite example: 
<suite name="Suite1" verbose="5" parallel="false" thread-count="2">
    <groups>

        <run>

            <include name="AAA" />
        </run>

    </groups>

    <classes>
        <class name="TestClassWithGroups" />
    </classes>

</suite>

Result:
org.testng.TestNGException: java.lang.NullPointerException
RemoteTestNG finishing: 0 ms
    at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:329)
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:90)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:203)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:174)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:111)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.NullPointerException
    at org.testng.xml.TestNGContentHandler.xmlClasses(TestNGContentHandler.java:332)
    at org.testng.xml.TestNGContentHandler.endElement(TestNGContentHandler.java:612)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2938)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:198)
    at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:17)
    at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:10)
    at org.testng.xml.Parser.parse(Parser.java:170)
    at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:299)
    ... 9 more

Original issue reported on code.google.com by inzer...@gmail.com on 22 May 2013 at 3:03