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https://issues.apache.org/jira/browse/XERCESJ-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13798854#comment-13798854
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Octavian Nadolu commented on XERCESJ-1615:
------------------------------------------
I created another schema that can be used to reproduce the NullPointerException.
I think that you just need to switch two line of codes in the
XSDAbstractTraverser.
- At line 834 you use the tempAttrGrp:
setAttributeGroupCount(attrGroupCounts, tempAttrGrp.getName(),
tempAttrGrp.getNamespace())
- and at line 835 you check if the tempAttrGrp is null:
(tempAttrGrp == null ) continue;
------- schema.xsd-------------------
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<xs:attributeGroup name="ag">
<xs:attributeGroup ref="ag2"/>
</xs:attributeGroup>
<xs:attributeGroup name="ag2">
<xs:attributeGroup ref="ag"></xs:attributeGroup>
</xs:attributeGroup>
</xs:schema>
------------------------------------------------
> Error not reported on duplicate attributes
> ------------------------------------------
>
> Key: XERCESJ-1615
> URL: https://issues.apache.org/jira/browse/XERCESJ-1615
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.0 Structures, XML Schema 1.1 Structures
> Affects Versions: 2.11.0
> Reporter: Octavian Nadolu
> Assignee: Mukul Gandhi
>
> If I validate the following schema Xerces does not complain about the the
> duplicate attribute. The same attribute group is referred twice.
> You can reproduce the issue on the xml-schema-1.1-dev branch.
> -------- schema.xsd --------------------
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified">
> <xs:complexType name="baseType">
> <xs:attributeGroup ref="globalAttributes"/>
> <xs:attributeGroup ref="globalAttributes"/>
> </xs:complexType>
>
> <xs:attributeGroup name="globalAttributes">
> <xs:attribute name="id" type="xs:ID"/>
> </xs:attributeGroup>
> </xs:schema>
> -------------------------------------------------------
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