DO NOT REPLY [Bug 43863] New: - A somewhat empty table-header crashes with a non-descriptive error message

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http://issues.apache.org/bugzilla/show_bug.cgi?id=43863

           Summary: A somewhat empty table-header crashes with a non-
                    descriptive error message
           Product: Fop
           Version: 0.94
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: general
        AssignedTo: fop-dev@xmlgraphics.apache.org
        ReportedBy: [EMAIL PROTECTED]


Having this section of XML in a table crashes Fop 0.94, with a non-descriptive
error message (below). I'm not entirely sure if it's the header itself, or
because it doesn't contain anything, but it works fine with all previous 
versions.

<fo:table-header>
  <fo:table-row>
    <fo:table-cell number-columns-spanned="2">
      <fo:block></fo:block>
    </fo:table-cell>
    <fo:table-cell>
      <fo:block></fo:block>
    </fo:table-cell>
  </fo:table-row>
</fo:table-header>

This is the error message:

Nov 14, 2007 3:30:37 PM org.apache.fop.cli.Main startFOP
SEVERE: Exception
java.lang.NullPointerException
        at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:168)
        at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)
        at org.apache.fop.cli.Main.startFOP(Main.java:166)
        at org.apache.fop.cli.Main.main(Main.java:197)

---------

java.lang.NullPointerException
        at
org.apache.fop.layoutmgr.table.RowPainter.addAreasAndFlushRow(RowPainter.java:149)
        at
org.apache.fop.layoutmgr.table.TableContentLayoutManager.iterateAndPaintPositions(TableContentLayoutManager.java:757)
        at
org.apache.fop.layoutmgr.table.TableContentLayoutManager.addAreas(TableContentLayoutManager.java:689)
        at
org.apache.fop.layoutmgr.table.TableLayoutManager.addAreas(TableLayoutManager.java:334)
        at
org.apache.fop.layoutmgr.AreaAdditionUtil.addAreas(AreaAdditionUtil.java:118)
        at
org.apache.fop.layoutmgr.FlowLayoutManager.addAreas(FlowLayoutManager.java:297)
        at org.apache.fop.layoutmgr.PageBreaker.addAreas(PageBreaker.java:241)
        at
org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:507)
        at
org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:370)
        at org.apache.fop.layoutmgr.PageBreaker.doPhase3(PageBreaker.java:262)
        at
org.apache.fop.layoutmgr.AbstractBreaker.doLayout(AbstractBreaker.java:345)
        at
org.apache.fop.layoutmgr.AbstractBreaker.doLayout(AbstractBreaker.java:263)
        at
org.apache.fop.layoutmgr.PageSequenceLayoutManager.activateLayout(PageSequenceLayoutManager.java:144)
        at
org.apache.fop.area.AreaTreeHandler.endPageSequence(AreaTreeHandler.java:233)
        at
org.apache.fop.fo.pagination.PageSequence.endOfNode(PageSequence.java:145)
        at
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.endElement(FOTreeBuilder.java:378)
        at org.apache.fop.fo.FOTreeBuilder.endElement(FOTreeBuilder.java:194)
        at
org.apache.xalan.transformer.TransformerIdentityImpl.endElement(TransformerIdentityImpl.java:1050)
        at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown 
Source)
        at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
        at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$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.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown 
Source)
        at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:452)
        at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)
        at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)
        at org.apache.fop.cli.Main.startFOP(Main.java:166)
        at org.apache.fop.cli.Main.main(Main.java:197)

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