https://issues.apache.org/bugzilla/show_bug.cgi?id=48765

           Summary: java.lang.NullPointerException:
                    org.apache.fop.layoutmgr.inline.InlineStackingLayoutMa
                    nager.getChangedKnuthElements(InlineStackingLayoutMana
                    ger.java:375)
           Product: Fop
           Version: all
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: blocker
          Priority: P2
         Component: pdf
        AssignedTo: fop-dev@xmlgraphics.apache.org
        ReportedBy: mathieu.malate...@gmail.com


Created an attachment (id=25014)
 --> (https://issues.apache.org/bugzilla/attachment.cgi?id=25014)
fo file

Here is my input docbook file:

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"; []>
<article>
<section>
 <title>title</title>
<blockquote>
<para>
The <emphasis role="bold"><anchor
id="example.anchor.1"/>anchor</emphasis> element is empty and
contributes
nothing to the flow of the content in which it occurs.  It is only useful
as a target.
</para>
</blockquote>
</section>
</article>

which I process with:

/usr/bin/xsltproc --stringparam fop1.extensions 1 --stringparam
ulink.show 0 --xinclude -o test2.fo
/usr/share/xml/docbook/stylesheet/nwalsh/fo/docbook.xsl test2.xml

and lead to:

$ ./fop test2.fo test2.pdf
Feb 17, 2010 2:52:18 PM org.apache.fop.apps.FOURIResolver resolve
SEVERE: Error with opening URL
'http://docbook.sourceforge.net/release/images/draft.png': Network is
unreachable
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:9588)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:10285)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:10980)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:11672)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:12361)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:13050)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:13736)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:14427)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:15118)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:15806)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:16496)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:17186)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:17873)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:18563)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:19253)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:19940)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:20631)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:21322)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI:
http://docbook.sourceforge.net/release/images/draft.png. (See position
2:22010)
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
WARNING: Font "Symbol,normal,700" not found. Substituting with
"Symbol,normal,400".
Feb 17, 2010 2:52:18 PM org.apache.fop.events.LoggingEventListener processEvent
WARNING: Font "ZapfDingbats,normal,700" not found. Substituting with
"ZapfDingbats,normal,400".
Feb 17, 2010 2:52:18 PM org.apache.fop.cli.Main startFOP
SEVERE: Exception
java.lang.NullPointerException
       at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:302)
       at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:130)
       at org.apache.fop.cli.Main.startFOP(Main.java:174)
       at org.apache.fop.cli.Main.main(Main.java:205)

---------

java.lang.NullPointerException
       at
org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager.getChangedKnuthElements(InlineStackingLayoutManager.java:375)
       at
org.apache.fop.layoutmgr.inline.InlineLayoutManager.getChangedKnuthElements(InlineLayoutManager.java:537)
       at
org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager.getChangedKnuthElements(InlineStackingLayoutManager.java:380)
       at
org.apache.fop.layoutmgr.inline.InlineLayoutManager.getChangedKnuthElements(InlineLayoutManager.java:537)
       at
org.apache.fop.layoutmgr.inline.LineLayoutManager.findHyphenationPoints(LineLayoutManager.java:1359)
       at
org.apache.fop.layoutmgr.inline.LineLayoutManager.findOptimalBreakingPoints(LineLayoutManager.java:797)
       at
org.apache.fop.layoutmgr.inline.LineLayoutManager.createLineBreaks(LineLayoutManager.java:763)
       at
org.apache.fop.layoutmgr.inline.LineLayoutManager.getNextKnuthElements(LineLayoutManager.java:592)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:571)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:552)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:280)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:123)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:115)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:571)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:552)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:280)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:123)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:115)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:571)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:552)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:280)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:123)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:115)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:571)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextChildElements(BlockStackingLayoutManager.java:552)
       at
org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:280)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:123)
       at
org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:115)
       at
org.apache.fop.layoutmgr.FlowLayoutManager.getNextChildElements(FlowLayoutManager.java:199)
       at
org.apache.fop.layoutmgr.FlowLayoutManager.addChildElements(FlowLayoutManager.java:140)
       at
org.apache.fop.layoutmgr.FlowLayoutManager.addChildElements(FlowLayoutManager.java:129)
       at
org.apache.fop.layoutmgr.FlowLayoutManager.getNextKnuthElements(FlowLayoutManager.java:70)
       at
org.apache.fop.layoutmgr.PageBreaker.getNextKnuthElements(PageBreaker.java:216)
       at
org.apache.fop.layoutmgr.AbstractBreaker.getNextBlockList(AbstractBreaker.java:692)
       at
org.apache.fop.layoutmgr.PageBreaker.getNextBlockList(PageBreaker.java:149)
       at
org.apache.fop.layoutmgr.PageBreaker.getNextBlockList(PageBreaker.java:132)
       at
org.apache.fop.layoutmgr.AbstractBreaker.doLayout(AbstractBreaker.java:337)
       at org.apache.fop.layoutmgr.PageBreaker.doLayout(PageBreaker.java:85)
       at
org.apache.fop.layoutmgr.PageSequenceLayoutManager.activateLayout(PageSequenceLayoutManager.java:107)
       at
org.apache.fop.area.AreaTreeHandler.endPageSequence(AreaTreeHandler.java:238)
       at
org.apache.fop.fo.pagination.PageSequence.endOfNode(PageSequence.java:120)
       at
org.apache.fop.fo.FOTreeBuilder$MainFOHandler.endElement(FOTreeBuilder.java:349)
       at org.apache.fop.fo.FOTreeBuilder.endElement(FOTreeBuilder.java:177)
       at
org.apache.xalan.transformer.TransformerIdentityImpl.endElement(TransformerIdentityImpl.java:1101)
       at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown
Source)
       at org.apache.xerces.xinclude.XIncludeHandler.endElement(Unknown Source)
       at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown
Source)
       at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$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:299)
       at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:130)
       at org.apache.fop.cli.Main.startFOP(Main.java:174)
       at org.apache.fop.cli.Main.main(Main.java:205)

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