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https://issues.apache.org/jira/browse/XALANC-715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13236405#comment-13236405
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Michael Kupchuk commented on XALANC-715:
----------------------------------------
Sorry for so long delay with patch approval. Seems like everything is fine now.
Thanx for the patch!
> NULL pointer access => crash
> ----------------------------
>
> Key: XALANC-715
> URL: https://issues.apache.org/jira/browse/XALANC-715
> Project: XalanC
> Issue Type: Bug
> Components: XalanC
> Affects Versions: CurrentCVS
> Environment: Any
> Reporter: Michael Kupchuk
> Assignee: Steven J. Hathaway
> Labels: crash
> Fix For: CurrentCVS
>
> Attachments: crash.xsl, empty-nodeset-patch.diff,
> empty-nodeset-patch.diff-rev1, test.xml
>
>
> Using a xalan:nodeset with an empty parameter causes it to return nodeset
> with no data, no parents, completly empty, which in further operations causes
> a NULL pointer access in release or debug assertion in debug.
> Maybe it's not a "very proper" use of xalan:nodeset, but IMHO crash/assertion
> is not the correct behaviour at all.
> Here is an example xslt to reproduce crash:
> <?xml version='1.0' encoding='windows-1251'?>
> <xsl:stylesheet exclude-result-prefixes="xalan" xmlns:xalan =
> "http://xml.apache.org/xalan";
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0">
> <xsl:output method="html" indent="yes" encoding='windows-1251'/>
> <xsl:strip-space elements="*"/>
> <xsl:template name="head-with-info">
> <xsl:param name="head"/>
> <xsl:param name="info"/>
> <xsl:if test="xalan:nodeset($head)/node()">
> <div class="heading"><xsl:copy-of select="$head"/></div>
> </xsl:if>
> <xsl:if test="string-length($info)>0 and xalan:nodeset($info)/node()">
> <div class="group-info"><xsl:copy-of select="$info"/></div>
> </xsl:if>
> </xsl:template>
> <xsl:template match="*" name="test">
> <xsl:value-of select="test_node/inner_test"/>
> <xsl:call-template name="head-with-info">
> <!-- <xsl:with-param name="head"><span>test
> head</span></xsl:with-param> -->
> <xsl:with-param name="info"><span>test info</span></xsl:with-param>
> </xsl:call-template>
> </xsl:template>
> </xsl:stylesheet>
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