[jira] [Created] (FOP-3251) Basic-link external destination URL are overwritten with previous values in an FO input stream

Mark Custer created FOP-3251:
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             Summary: Basic-link external destination URL are overwritten with previous values in an FO input stream
                 Key: FOP-3251
                 URL: https://issues.apache.org/jira/browse/FOP-3251
             Project: FOP
          Issue Type: Bug
    Affects Versions: 2.10
            Reporter: Mark Custer
         Attachments: Hover_showing_19_overriding_OX_in_basic_link.png, test-links.fo, test-links.pdf

I recently discovered that Apache FOP can overwrite the "url" value encoded in basic links.  Example:

If there are 2 basic links in a file, and the first has a value with the characters "0P" and the second link has the characters "11", then the second link that should have been "11" will render as "OP".  I believe that this happening due to some hashing techniques to cut down on processing when trying to determine if various URIs are identical.  

I have attached both an XSL-FO file and its result as rendered by Apache FOP 2.10

I've only tested 2 versions so far (2.10 and 2.7), though, so I don't know how far back the issue spans.

I should also say that though the examples in this file are contrived to show where the clashes occur, the reason I stumbled across this bug is because I have a set of PDF files that I need to create that have a large number of links with 6-digit hash values as part of their path, and Apache FOP is rendering many of those as indistinguishable duplicate values.  If this is indeed an optimization issue for base URIs, and if this feature can be turned off with a configuration, just let me know, as that type of fix would more suffice for my use case.  



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