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https://issues.apache.org/jira/browse/PDFBOX-3218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15121244#comment-15121244
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ASF GitHub Bot commented on PDFBOX-3218:
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GitHub user rsby opened a pull request:
https://github.com/apache/pdfbox/pull/19
PDFBOX-3218 Altering AcroForm merge handling
PDFBOX-3218
Altering AcroForm merge handling to avoid merging same fields numerous times
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rsby/pdfbox trunk
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/pdfbox/pull/19.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #19
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commit 57d9a31faa256e9680b82fff553f054d1264b5aa
Author: rees <[email protected]>
Date: 2016-01-27T22:38:34Z
Alter ArcoForm merging to add only root fields
commit 300af4a5ec68e2592d80cb04d2ec85c7972f1027
Author: rees <[email protected]>
Date: 2016-01-28T11:01:30Z
PDFBOX-3218 add unit test asserting each field merged only once
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> PDFMergerUtility improperly merges AcroForms, causing some forms to break
> -------------------------------------------------------------------------
>
> Key: PDFBOX-3218
> URL: https://issues.apache.org/jira/browse/PDFBOX-3218
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.0.0
> Reporter: Rees Byars
>
> In PDFMergerUtility.mergeAcroForm, adding a parent field to the destination
> fields automatically adds the children, but the code does not account for
> this. The result is that the same fields get added many times with different
> names. This is a silent error for most PDFs. However, for some forms, the
> resultant PDFs cause SOM expression errors in Adobe Reader.
> This problem can be reproduced by appending the following PDFs in the order
> listed:
> http://www.vba.va.gov/pubs/forms/VBA-21-4185-ARE.pdf
> http://www.vba.va.gov/pubs/forms/VBA-21-534EZ-ARE.pdf
> We were able to fix this issue for our purposes by forking the github mirror
> and altering the mergeAcroForm method to only append fields whose parent is
> null.
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