Bug: git ls-files and ignored directories

> Hi!
> 
> I think I've been bitten by a bug in git ls-files - committed directories (and files therein) which are matched by a "dir/" gitignore rule are not shown by "git ls-files --exclude-standard -i", although they should be. Matched files are shown.
> 
> I've found a very brief discussion on this mailing list from March 2011 about this, including a repro procedure which still is valid today, at http://marc.info/?l=git&m=129926031808376&w=4
> 
> Is that a known/in progress bug? If yes, (when) can a fix be expected? How can I work around this in the meantime? 
> If it's not a bug, how do you do this properly? My original problem was that  I want to list files which have been committed to git but match an existing gitignore pattern. Richard Hansen has written a very nice alias for that (http://stackoverflow.com/a/9370094/599884, with some discussion of this bug in the comments), but due to the present bug this does not work totally correctly. 
> 
> Having a built-in git feature for this would be great, btw ("git ls-files --committed-but-ignored"? :-)). Do I have to submit a separate feature request?
> 
> thanks, 
> Christoph
> 
> p.s.: The repro procedure from the linked list discussion:
>> $ mkdir test
>> $ cd test
>> $ git init
>> $ mkdir testdir
>> $ touch testdir/test
>> $ git add testdir/test
>> $ git commit -m "add test"
>> $ echo "testdir/" > .gitignore
>> $ git ls-files --exclude-standard -i
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