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Posted to j-dev@xerces.apache.org by "Radu Coravu (JIRA)" <xe...@xml.apache.org> on 2012/07/12 12:46:35 UTC
[jira] [Created] (XERCESJ-1570) Stack overflow when validating XML
with XML Schema (using 1.1)
Radu Coravu created XERCESJ-1570:
------------------------------------
Summary: Stack overflow when validating XML with XML Schema (using 1.1)
Key: XERCESJ-1570
URL: https://issues.apache.org/jira/browse/XERCESJ-1570
Project: Xerces2-J
Issue Type: Bug
Components: XML Schema 1.1 Datatypes
Affects Versions: 2.11.0
Reporter: Radu Coravu
Fix For: 2.11.0
The XML is like:
<?xml version="1.0" encoding="UTF-8"?>
<personnel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="personal.xsd">
<person xsi:type="testType"></person>
</personnel>
The XML Schema is like:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="testType"/>
<xs:element name="personnel">
<xs:complexType>
<xs:sequence>
<xs:element ref="person" minOccurs="1" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexType name="fidji">
<xs:attribute name="attr"/>
</xs:complexType>
<xs:element name="person" type="fidji"/>
</xs:schema>
The schema is parsed as an XML Schema 1.1 and then used to validate the XML.
The stack overflow is like:
java.lang.StackOverflowError
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:216)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
at org.apache.xerces.impl.xs.XSConstraints.checkTypeDerivationOk(XSConstraints.java:118)
at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.getAndCheckXsiType(XMLSchemaValidatorXerces.java:2959)
at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.handleStartElement(XMLSchemaValidatorXerces.java:2252)
at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.startElement(XMLSchemaValidatorXerces.java:815)
at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:87)
at org.apache.xerces.xinclude.XIncludeHandler.startElement(XIncludeHandler.java:963)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:268)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1655)
I added some logging in XSConstraints, it has some recursive code like:
if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE)
return checkComplexDerivation((XSComplexTypeDecl)directBase, base, block);
which could be guarded to be something like:
if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE
&& directBase != derived
)
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[jira] [Commented] (XERCESJ-1570) Stack overflow when validating
XML with XML Schema (using 1.1)
Posted by "Radu Coravu (JIRA)" <xe...@xml.apache.org>.
[ https://issues.apache.org/jira/browse/XERCESJ-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414868#comment-13414868 ]
Radu Coravu commented on XERCESJ-1570:
--------------------------------------
I think that the error appears because the XML Schema is parsed as 1.1 but then the XML is validated with it as if it was an 1.0 schema.
If you cannot reproduce it, it's OK. You can close it and when we'll update the tested Xerces I will post a new bug if it is still encountered.
> Stack overflow when validating XML with XML Schema (using 1.1)
> --------------------------------------------------------------
>
> Key: XERCESJ-1570
> URL: https://issues.apache.org/jira/browse/XERCESJ-1570
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.1 Datatypes
> Affects Versions: 2.11.0
> Reporter: Radu Coravu
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> The XML is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <personnel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="personal.xsd">
> <person xsi:type="testType"></person>
> </personnel>
> The XML Schema is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
> <xs:complexType name="testType"/>
> <xs:element name="personnel">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="person" minOccurs="1" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:complexType name="fidji">
> <xs:attribute name="attr"/>
> </xs:complexType>
> <xs:element name="person" type="fidji"/>
> </xs:schema>
> The schema is parsed as an XML Schema 1.1 and then used to validate the XML.
> The stack overflow is like:
> java.lang.StackOverflowError
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:216)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkTypeDerivationOk(XSConstraints.java:118)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.getAndCheckXsiType(XMLSchemaValidatorXerces.java:2959)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.handleStartElement(XMLSchemaValidatorXerces.java:2252)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.startElement(XMLSchemaValidatorXerces.java:815)
> at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:87)
> at org.apache.xerces.xinclude.XIncludeHandler.startElement(XIncludeHandler.java:963)
> at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:268)
> at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1655)
> I added some logging in XSConstraints, it has some recursive code like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE)
> return checkComplexDerivation((XSComplexTypeDecl)directBase, base, block);
> which could be guarded to be something like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE
> && directBase != derived
> )
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[jira] [Resolved] (XERCESJ-1570) Stack overflow when validating XML
with XML Schema (using 1.1)
Posted by "Mukul Gandhi (JIRA)" <xe...@xml.apache.org>.
[ https://issues.apache.org/jira/browse/XERCESJ-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mukul Gandhi resolved XERCESJ-1570.
-----------------------------------
Resolution: Cannot Reproduce
as per the suggestion from OP, resolving this issue.
> Stack overflow when validating XML with XML Schema (using 1.1)
> --------------------------------------------------------------
>
> Key: XERCESJ-1570
> URL: https://issues.apache.org/jira/browse/XERCESJ-1570
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.1 Datatypes
> Affects Versions: 2.11.0
> Reporter: Radu Coravu
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> The XML is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <personnel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="personal.xsd">
> <person xsi:type="testType"></person>
> </personnel>
> The XML Schema is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
> <xs:complexType name="testType"/>
> <xs:element name="personnel">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="person" minOccurs="1" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:complexType name="fidji">
> <xs:attribute name="attr"/>
> </xs:complexType>
> <xs:element name="person" type="fidji"/>
> </xs:schema>
> The schema is parsed as an XML Schema 1.1 and then used to validate the XML.
> The stack overflow is like:
> java.lang.StackOverflowError
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:216)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkTypeDerivationOk(XSConstraints.java:118)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.getAndCheckXsiType(XMLSchemaValidatorXerces.java:2959)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.handleStartElement(XMLSchemaValidatorXerces.java:2252)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.startElement(XMLSchemaValidatorXerces.java:815)
> at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:87)
> at org.apache.xerces.xinclude.XIncludeHandler.startElement(XIncludeHandler.java:963)
> at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:268)
> at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1655)
> I added some logging in XSConstraints, it has some recursive code like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE)
> return checkComplexDerivation((XSComplexTypeDecl)directBase, base, block);
> which could be guarded to be something like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE
> && directBase != derived
> )
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[jira] [Commented] (XERCESJ-1570) Stack overflow when validating
XML with XML Schema (using 1.1)
Posted by "Mukul Gandhi (JIRA)" <xe...@xml.apache.org>.
[ https://issues.apache.org/jira/browse/XERCESJ-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414502#comment-13414502 ]
Mukul Gandhi commented on XERCESJ-1570:
---------------------------------------
Are you using the published schema 1.1 beta? I can see the schema 1.1 SVN code base to be working fine, which gives the following message during validation,
cvc-elt.4.3: Type 'testType' is not validly derived from the type definition, 'fidji', of element 'person'.
> Stack overflow when validating XML with XML Schema (using 1.1)
> --------------------------------------------------------------
>
> Key: XERCESJ-1570
> URL: https://issues.apache.org/jira/browse/XERCESJ-1570
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.1 Datatypes
> Affects Versions: 2.11.0
> Reporter: Radu Coravu
> Fix For: 2.11.0
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> The XML is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <personnel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="personal.xsd">
> <person xsi:type="testType"></person>
> </personnel>
> The XML Schema is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
> <xs:complexType name="testType"/>
> <xs:element name="personnel">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="person" minOccurs="1" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:complexType name="fidji">
> <xs:attribute name="attr"/>
> </xs:complexType>
> <xs:element name="person" type="fidji"/>
> </xs:schema>
> The schema is parsed as an XML Schema 1.1 and then used to validate the XML.
> The stack overflow is like:
> java.lang.StackOverflowError
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:216)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkTypeDerivationOk(XSConstraints.java:118)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.getAndCheckXsiType(XMLSchemaValidatorXerces.java:2959)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.handleStartElement(XMLSchemaValidatorXerces.java:2252)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.startElement(XMLSchemaValidatorXerces.java:815)
> at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:87)
> at org.apache.xerces.xinclude.XIncludeHandler.startElement(XIncludeHandler.java:963)
> at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:268)
> at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1655)
> I added some logging in XSConstraints, it has some recursive code like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE)
> return checkComplexDerivation((XSComplexTypeDecl)directBase, base, block);
> which could be guarded to be something like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE
> && directBase != derived
> )
--
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[jira] [Updated] (XERCESJ-1570) Stack overflow when validating XML
with XML Schema (using 1.1)
Posted by "Michael Glavassevich (JIRA)" <xe...@xml.apache.org>.
[ https://issues.apache.org/jira/browse/XERCESJ-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Glavassevich updated XERCESJ-1570:
------------------------------------------
Fix Version/s: (was: 2.11.0)
> Stack overflow when validating XML with XML Schema (using 1.1)
> --------------------------------------------------------------
>
> Key: XERCESJ-1570
> URL: https://issues.apache.org/jira/browse/XERCESJ-1570
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.1 Datatypes
> Affects Versions: 2.11.0
> Reporter: Radu Coravu
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> The XML is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <personnel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="personal.xsd">
> <person xsi:type="testType"></person>
> </personnel>
> The XML Schema is like:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
> <xs:complexType name="testType"/>
> <xs:element name="personnel">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="person" minOccurs="1" maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:complexType name="fidji">
> <xs:attribute name="attr"/>
> </xs:complexType>
> <xs:element name="person" type="fidji"/>
> </xs:schema>
> The schema is parsed as an XML Schema 1.1 and then used to validate the XML.
> The stack overflow is like:
> java.lang.StackOverflowError
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:216)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkComplexDerivation(XSConstraints.java:241)
> at org.apache.xerces.impl.xs.XSConstraints.checkTypeDerivationOk(XSConstraints.java:118)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.getAndCheckXsiType(XMLSchemaValidatorXerces.java:2959)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.handleStartElement(XMLSchemaValidatorXerces.java:2252)
> at org.apache.xerces.impl.xs.XMLSchemaValidatorXerces.startElement(XMLSchemaValidatorXerces.java:815)
> at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:87)
> at org.apache.xerces.xinclude.XIncludeHandler.startElement(XIncludeHandler.java:963)
> at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:268)
> at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1655)
> I added some logging in XSConstraints, it has some recursive code like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE)
> return checkComplexDerivation((XSComplexTypeDecl)directBase, base, block);
> which could be guarded to be something like:
> if (directBase.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE
> && directBase != derived
> )
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