DO NOT REPLY [Bug 6255] New: - Xalan 2.2 mishandles result tree fragment

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=6255

Xalan 2.2 mishandles result tree fragment

           Summary: Xalan 2.2 mishandles result tree fragment
           Product: XalanJ2
           Version: 2.2.0
          Platform: PC
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Xalan
        AssignedTo: xalan-dev@xml.apache.org
        ReportedBy: pfeiffer@well.com


Xalan is incorrectly processing a result tree fragment in a recursive template.

I am using the following stylesheet (notice the number 3 at the end of 
the line marked "NOTICE THIS NUMBER").

---------------- BEGIN STYLESHEET ---------------------
<xsl:stylesheet 
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   version="1.0">

<xsl:template name="total-numbers">
   <xsl:param name="list"/>3<!-- NOTICE THIS NUMBER -->
   <xsl:variable name="wlist" 
      select="concat(normalize-space($list), ' ')"/>
   <xsl:choose>
      <xsl:when test="$wlist!=' '">
         <xsl:variable name="first" 
            select="substring-before($wlist, ' ')"/>
         <xsl:variable name="rest" 
            select="substring-after($wlist, ' ')"/>
         <xsl:variable name="total">
            <xsl:call-template name="total-numbers">
               <xsl:with-param name="list" select="$rest"/>
            </xsl:call-template>
         </xsl:variable>
         <xsl:value-of select="number($first) + number($total)"/>
      </xsl:when>
      <xsl:otherwise>0</xsl:otherwise>
   </xsl:choose>
</xsl:template>

<xsl:template match="/">
   <xsl:call-template name="total-numbers">
      <xsl:with-param name="list" select="."/>
   </xsl:call-template>
</xsl:template>


</xsl:stylesheet>
---------------- END STYLESHEET ---------------------


If I use the following input,


---------------- BEGIN INPUT ---------------------
<numbers>12  34.5  18.2  -35</numbers>
---------------- END INPUT ---------------------


The stylesheet should get output like this:


---------------- BEGIN OUTPUT ---------------------
<?xml version="1.0" encoding="utf-8"?>3
    NaN
---------------- END OUTPUT ---------------------


Instead, the stylesheet output is 


---------------- BEGIN OUTPUT ---------------------
<?xml version="1.0" encoding="UTF-8"?>
3
   15
---------------- END OUTPUT ---------------------


This stylesheet came from Michael Kay's book XSLT Programmer's Reference (page 
616 of the second edition), and Michael himself verified that this output from 
Xalan is incorrect.