DO NOT REPLY [Bug 6782] New: - xalan output content lost when templates called include copy-of

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=6782

xalan output content lost when templates called include copy-of

           Summary: xalan output content lost when templates called include
                    copy-of
           Product: XalanJ2
           Version: 2.0.0
          Platform: PC
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Major
          Priority: Other
         Component: org.apache.xalan
        AssignedTo: xalan-dev@xml.apache.org
        ReportedBy: mick.woolley@cmgplc.com


Xalan transform fails to produce its output when the marked template 'breakMe' 
is included. This all works as expected in 2.2.D14, but fails in 2.3. Also, the 
problem seems to lie in having several templates using copy-of. In trying to 
reproduce a simple test case, I also had out of memory and null pointer 
exceptions, where uncontrolled recursion appears to have occured.

<?xml version="1.0" ?>

<screen>
	<list>
		<item code="1"></item>
		<item code="2"></item>
		<item code="3"></item>
	</list>
</screen>

<?xml version="1.0" ?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" >
<xsl:output encoding="iso-8859-1"/>

<!--
	main template to produce screen
-->
<xsl:template match="screen">
	<xsl:call-template name="template1" />
</xsl:template>


<xsl:template name="template1">

	<xsl:call-template name="copier">
		<xsl:with-param name="content">

			<!-- comment this out and the display works when 
breakMe template is still there -->
			<xsl:call-template name="template2"/>

			<xsl:call-template name="listTemplate"/>
		</xsl:with-param>
	</xsl:call-template>

</xsl:template>


<!--
	NB Can remove the nested call-template and also works when breakMe 
template present ...
-->
<xsl:template name="template2">

	<xsl:call-template name="copier">
		<xsl:with-param name="content">
			<xsl:call-template name="template3"/>
		</xsl:with-param>
	</xsl:call-template>

</xsl:template>

<xsl:template name="template3">
	template3
</xsl:template>


<!--
	generate list.
-->
<xsl:template name="listTemplate">

			*** FULL LIST ***
			<xsl:call-template name="listItems"/>

</xsl:template>


<!--
	NB This is where the program can all go wrong
-->
<xsl:template name="listItems">
	<xsl:for-each select="/screen/list/item">
		hi
		<!--
			put this template in, content (hi, lo, and FULL LIST) 
is lost ...
			comment it out and it works
		-->
		<xsl:call-template name="breakMe"/> 
		bye
	</xsl:for-each>
</xsl:template>


<xsl:template name="breakMe">
	broken
</xsl:template>


<xsl:template name="copier">
	<xsl:param name="content"></xsl:param>

	<xsl:copy-of select="$content"/>
</xsl:template>


</xsl:stylesheet>