[FOP-1776] NPE caused by nested empty fo:inline with id

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.5
• Component/s: layout/inline
• Environment: Operating System: All; Platform: All
• External issue ID: 48765
• Assignee: Unassigned
• Reporter: Mathieu Malaterre
• Created: 18/Feb/10 11:40
• Updated: 06/Mar/20 09:13

Description

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)

Issue Links

• is duplicated by: FOP-2096 NPE being thrown when hyphenation is used
• is duplicated by: FOP-2139 NullPointerException if a docbook anchor element is inside an emphasis element
• is duplicated by: FOP-2401 NullPointerException near InlineStackingLayoutManager
• relates to: FOP-1798 [PATCH] Empty fo:inline objects with id attribute generate blank line