Björn Kautler created FOP-2518:
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             Summary: NullPointerException
                 Key: FOP-2518
                 URL: https://issues.apache.org/jira/browse/FOP-2518
             Project: FOP
          Issue Type: Bug
    Affects Versions: 2.0
            Reporter: Björn Kautler
            Priority: Blocker


FOP throws the following NPE when trying to transform a DocBook document to PDF:

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Caused by: java.lang.NullPointerException
        at 
org.apache.fop.layoutmgr.list.ListItemLayoutManager.getCombinedKnuthElementsForListItem(ListItemLayoutManager.java:405)
        at 
org.apache.fop.layoutmgr.list.ListItemLayoutManager.getNextKnuthElements(ListItemLayoutManager.java:326)
        at 
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:239)
        at 
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:498)
        at 
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:289)
        at 
org.apache.fop.layoutmgr.list.ListBlockLayoutManager.getNextKnuthElements(ListBlockLayoutManager.java:103)
        at 
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:239)
        at 
org.apache.fop.layoutmgr.BlockLayoutManager.getNextChildElements(BlockLayoutManager.java:141)
        at 
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:289)
        at 
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:113)
        at 
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:105)
        at 
org.apache.fop.layoutmgr.BlockLayoutManager.getNextChildElements(BlockLayoutManager.java:141)
        at 
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:289)
        at 
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:113)
        at 
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:105)
        at 
org.apache.fop.layoutmgr.FlowLayoutManager.getNextChildElements(FlowLayoutManager.java:223)
        at 
org.apache.fop.layoutmgr.FlowLayoutManager.addChildElements(FlowLayoutManager.java:147)
        at 
org.apache.fop.layoutmgr.FlowLayoutManager.getNextKnuthElements(FlowLayoutManager.java:116)
        at 
org.apache.fop.layoutmgr.FlowLayoutManager.getNextKnuthElements(FlowLayoutManager.java:69)
        at 
org.apache.fop.layoutmgr.PageBreaker.getNextKnuthElements(PageBreaker.java:252)
        at 
org.apache.fop.layoutmgr.AbstractBreaker.getNextBlockList(AbstractBreaker.java:643)
        at 
org.apache.fop.layoutmgr.PageBreaker.getNextBlockList(PageBreaker.java:178)
        at 
org.apache.fop.layoutmgr.PageBreaker.getNextBlockList(PageBreaker.java:158)
        at 
org.apache.fop.layoutmgr.AbstractBreaker.doLayout(AbstractBreaker.java:384)
        at org.apache.fop.layoutmgr.PageBreaker.doLayout(PageBreaker.java:112)
        at 
org.apache.fop.layoutmgr.PageSequenceLayoutManager.activateLayout(PageSequenceLayoutManager.java:138)
        at 
org.apache.fop.area.AreaTreeHandler.endPageSequence(AreaTreeHandler.java:267)
        at 
org.apache.fop.fo.pagination.PageSequence.endOfNode(PageSequence.java:130)
        at 
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.endElement(FOTreeBuilder.java:360)
        at org.apache.fop.fo.FOTreeBuilder.endElement(FOTreeBuilder.java:190)
        at 
org.apache.xalan.transformer.TransformerIdentityImpl.endElement(TransformerIdentityImpl.java:1102)
        at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown 
Source)
        at 
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 Source)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
        at 
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:485)
        at 
org.apache.xalan.transformer.TransformerIdentityImpl$transform.call(Unknown 
Source)
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