Robert Meyer updated FOP-2160:

    Attachment: patch.diff

I had a quick look at this and found that the null pointer was happening 
because the adjustingInfo variable was not set. I am surprised this issue has 
not come up before as having gone through the debug process, it seems clear 
that this value may or may not be set. The 
AbstractTextArea.applyVariationFactor handles null whereas the same method in 
FilledArea does not. The reason why the null pointer is not occuring when you 
omit any of the three things you mentioned is because the applyVariations is 
not called which bypasses the issue. The patch simply allows the FilledArea 
class method to handle the null value.
> writing-mode="lr" causing null-pointer-exception
> ------------------------------------------------
>                 Key: FOP-2160
>                 URL: https://issues.apache.org/jira/browse/FOP-2160
>             Project: Fop
>          Issue Type: Bug
>          Components: page-master/layout
>    Affects Versions: 1.1
>         Environment: Operating System: All
> Platform: All
>            Reporter: james quest
>         Attachments: patch.diff, stack
> i have seen that this fo causes a null-pointer-exception at fop1.1rc1.
> the same fo is perfectly fine if writing-mode="lr" or not specified
> <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"; font-family="Arial" 
> writing-mode="rl">
>   <fo:layout-master-set>
>     <fo:simple-page-master page-height="297mm" page-width="210mm" 
> master-name="a4">
>       <fo:region-body margin-top="11mm" margin-bottom="12mm" 
> margin-right="10mm" margin-left="10mm"/>
>     </fo:simple-page-master>
>   </fo:layout-master-set>
>   <fo:page-sequence master-reference="a4">
>     <fo:flow flow-name="xsl-region-body">
>       <fo:block id="1">وكلما</fo:block>
>       <fo:block text-align-last="justify">More text <fo:leader 
> leader-pattern="dots"/> <fo:page-number-citation ref-id="1"/>
>       </fo:block>
>     </fo:flow>
>   </fo:page-sequence>
> </fo:root>
> attached is the stack trace. 
> if you remove *any* of these 3 things, then there is no issue either 
> 1. <fo:leader>
> 2. <fo:page-number-citation>
> 3. text-align-last="justify"

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