viewcvs 1.0中使用viewcvs浏览某个具体版本的信息时有错误：

yxt168118

RedHat Enterprise Edition 下安装viewcvs 1.0后，使用viewcvs浏览某个具体版本的信息时，网页显示如下错误：
An Exception Has Occurred
Python Traceback

Traceback (most recent call last):
  File "/usr/local/viewcvs-1.0-dev/lib/viewcvs.py", line 3423, in main
    request.run_viewcvs()
  File "/usr/local/viewcvs-1.0-dev/lib/viewcvs.py", line 388, in run_viewcvs
    self.view_func(self)
  File "/usr/local/viewcvs-1.0-dev/lib/viewcvs.py", line 2858, in view_revision
    date, author, msg, changes = vclib.svn.get_revision_info(request.repos, rev)
  File "/usr/local/viewcvs-1.0-dev/lib/vclib/svn/__init__.py", line 262, in get_revision_info
    editor = repos.ChangeCollector(svnrepos.fs_ptr, fsroot,
AttributeError: 'module' object has no attribute 'ChangeCollector'

哪位高手能够不吝赐教，万分感谢哦！！