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From "Michael Kupchuk (Closed) (JIRA)" <xalan-...@xml.apache.org>
Subject [jira] [Closed] (XALANC-715) NULL pointer access => crash
Date Fri, 23 Mar 2012 06:42:23 GMT

     [ https://issues.apache.org/jira/browse/XALANC-715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Kupchuk closed XALANC-715.
----------------------------------


Crash fixed.
                
> 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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