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https://issues.apache.org/jira/browse/PDFBOX-5400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17515095#comment-17515095
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Andreas Lehmkühler commented on PDFBOX-5400:
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{quote}Found the difference between trunk and 2.0.{quote}
There are a lot of changes in the trunk so that it isn't that easy to compare
both to each other
{quote}In both branches, if a referenced object is missing in the xref table,
the object should be read from a brute force object list.{quote}
Correct, in 2.0 it was triggered in {{checkXrefOffsets}}, but due to the
changes from PDFBOX-5238 it isn't any more in every case. The following code
still assumes that the bf search was triggered in {{checkXrefOffsets}} if
necessary.
However, it is a valid hint and may lead to a solution. My first attempt to
trigger a later bf search didn't work, the exception is gone but the rendering
is empty. I'll have to dig deeper
> Page tree root must be a dictionary
> -----------------------------------
>
> Key: PDFBOX-5400
> URL: https://issues.apache.org/jira/browse/PDFBOX-5400
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.26
> Reporter: Tilman Hausherr
> Assignee: Andreas Lehmkühler
> Priority: Major
> Labels: regression
> Attachments: 4ECBGZDM5GUZG7UT75RV5GTUFWF5TSXK.pdf
>
>
> worked in 2.0.25
> {noformat}
> Caused by: java.io.IOException: Page tree root must be a dictionary
> org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:198)
> org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:226)
> org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1107)
> {noformat}
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