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https://issues.apache.org/jira/browse/PDFBOX-2234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14074892#comment-14074892
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John Hewson commented on PDFBOX-2234:
-------------------------------------
I'm going to speculate that the validation does things like checking page
resources before content streams but when this happens the other way around
then the resources are not available as preflight subclasses many "internal"
PDFBox classes.
> [PATCH] Invalid Color space preflight error on Java 8
> -----------------------------------------------------
>
> Key: PDFBOX-2234
> URL: https://issues.apache.org/jira/browse/PDFBOX-2234
> Project: PDFBox
> Issue Type: Bug
> Components: Preflight
> Affects Versions: 1.8.6, 1.8.7, 2.0.0
> Reporter: simon steiner
> Labels: JDK1.8
> Fix For: 1.8.7, 2.0.0
>
> Attachments: expected.pdf, pdfavalidationjava8.patch
>
>
> java -cp
> pdf-box-svn/preflight/target/preflight-2.0.0-SNAPSHOT.jar:pdf-box-svn/app/target/pdfbox-app-2.0.0-SNAPSHOT.jar:pdf-box-svn/xmpbox/target/xmpbox-2.0.0-SNAPSHOT.jar:lib/commons-io-1.3.1.jar
> org.apache.pdfbox.preflight.Validator_A1b expected.pdf
> Java 7:
> The file expected.pdf is a valid PDF/A-1b file
> Java 8:
> The fileexpected.pdf is not valid, error(s) :
> 2.4.3 : Invalid Color space, The operator "G" can't be used without Color
> Profile
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