FileSetManager.delete() does not delete empty directories if they contained symlink that was deleted

For the directory structure

./
  dir/
    symlink

and the file set

<fileset>
  <includes>
    <include>dir/**</include>
  </includes>
  <followSymlinks>false</followSymlinks>
</fileset>

the directory dir won't be deleted although all its contents (symlink) have been deleted.