[FOP-2496] fop2.0 crashes if docbook <note> is last inside a <listitem> or a <step>. No bug in fop1.1

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.0
• Component/s: renderer/pdf
• Assignee: Unassigned
• Reporter: Lennart Johansson
• Created: 08/Jul/15 19:10
• Updated: 14/Feb/16 14:51
• Resolved: 09/Jul/15 15:47

Description

fop2.0 crashes if docbook <note> is last inside a <listitem> or a <step>. No bug in fop1.1

This works in fop1.1 and it is good docbook syntax and should not be a problem.

A workaround, that also shows the problem, is to insert an empty <para> between </note> and </listitem), or directly in the .fo file, insert an extra <fo:block></fo.block>.
We are now forced to use this workaround in the building scripts - not nice!

Appended:

• note-problem-fop2.0-listitem-crash.fo = Small example .fo file with a note last in a listitem
• note-problem-fop2.0-listitem-workaround-patched.fo = Workaround-patched .fo file (listitem)
• note-problem-fop2.0-step-crash.fo = Small example .fo file with a note last in a step
• note-problem-fop2.0-step-workaround-patched.fo = Workaround-patched .fo file (step)

The fop CRASH log is below:

INFO: Rendered page #1.
INFO: Rendered page #2.
Jul 8, 2015 8:18:06 PM org.apache.fop.cli.Main startFOP
SEVERE: Exception
java.lang.NullPointerException
at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:288)
at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)
at org.apache.fop.cli.Main.startFOP(Main.java:186)
at org.apache.fop.cli.Main.main(Main.java:217)
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.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$MainFOHandler.endElement(FOTreeBuilder.java:360)
at org.apache.fop.fo.FOTreeBuilder.endElement(FOTreeBuilder.java:190)
at org.apache.xalan.transformer.TransformerIdentityImpl.endElement(TransformerIdentityImpl.java:1101)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at org.apache.xerces.xinclude.XIncludeHandler.endElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$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:484)
at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:285)
... 3 more

Issue Links

• duplicates: FOP-2461 NullPointerException in ListItemLayoutManager since Temp_BasicSideFloat Merge