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Posted to dev@xalan.apache.org by "David Bertoni (JIRA)" <xa...@xml.apache.org> on 2006/12/06 00:41:22 UTC

[jira] Commented: (XALANC-625) Spurious (though harmless) assert failure in XPath::findNodeSet() when an expression contains an empty node-set enclosed in parenthesis

    [ http://issues.apache.org/jira/browse/XALANC-625?page=comments#action_12455798 ] 
            
David Bertoni commented on XALANC-625:
--------------------------------------

This assert actually uncovered what is a more serious error.  In cases where executeMore() returns a non-null XObjectPtr, that value should be used, but the code in group() is actually ignoring it.

I'm attaching a stylesheet and source document that not only trip the assert, but also return an incorrect result.

A patch will follow.

> Spurious (though harmless) assert failure in XPath::findNodeSet() when an expression contains an empty node-set enclosed in parenthesis
> ---------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: XALANC-625
>                 URL: http://issues.apache.org/jira/browse/XALANC-625
>             Project: XalanC
>          Issue Type: Bug
>          Components: XPathC
>    Affects Versions: 1.10
>         Environment: winxpsp2
>            Reporter: Alain Le Guennec
>            Priority: Minor
>         Attachments: assertemptynodeset.xslt, nonemptynodeset.xml, nonemptynodeset.xsl
>
>
> There is a spurious (though apparently harmless) assert failure in XPath::findNodeSet() when compiled in Debug mode
> if an expression contains an empty node-set enclosed in parenthesis, as in the following stylesheet:
> <?xml version="1.0"  encoding = "ISO-8859-1"?>
> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> 	<xsl:template match="/">
> 		<xsl:variable name="empty-nodeset" select="/.."/>
> 		<xsl:variable name="foo" select="($empty-nodeset)/@bar"/>
> 		<xsl:value-of select="count($foo)"/>
> 	</xsl:template>
> </xsl:stylesheet>
> Best regards,
> Alain Le Guennec.

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