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https://issues.apache.org/jira/browse/XERCESJ-1080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12502432
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Michael Glavassevich commented on XERCESJ-1080:
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Looks like my fix got trampled by another commit [1]. I'll add it back.
[1]
http://svn.apache.org/viewvc/xerces/java/trunk/src/org/apache/xerces/impl/xs/XSAttributeUseImpl.java?r1=320528&r2=379204&diff_format=h
> XSAttributeUseImpl.getConstraintValue() might cause NPE
> -------------------------------------------------------
>
> Key: XERCESJ-1080
> URL: https://issues.apache.org/jira/browse/XERCESJ-1080
> Project: Xerces2-J
> Issue Type: Bug
> Affects Versions: 2.6.2
> Environment: Xerces2-J CVS HEAD (May 12, 2005)
> Reporter: Kurt Riede
> Priority: Minor
> Attachments: attP006.xsd
>
>
> In case of error "a-props-correct.2" (Invalid value constraint value '%1' in
> attribute '%2'.), attribute fDefault or fDefault.actualValue might be null
> and the code might result in a NPE.
> How to reproduce: Example from xml schema test suite:
> msxsdtest\attribute\attP006.xsd
> In my case, when anlysing invalid schema files (as good as possible), it is
> important not to have this exception, so I'm working with my own patched
> version of Xerces2-J. It would be nice if you would fix this somewhen.
> My fix is quite simple: just check on null:
> Old:
> return getConstraintType() == XSConstants.VC_NONE ?
> null :
> fDefault.actualValue.toString();
> New:
> return getConstraintType() == XSConstants.VC_NONE ? null :
> (fDefault == null ? null :
> (fDefault.actualValue == null ? null :
> (fDefault.actualValue.toString())));
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