hgview #10074864 Extension fails to load with mercurial 4.1 [open]

The following error occurs when attempting to run 'hg qv' with hgview exabled. I am using Mercurial 4.1 on OSX. The hgview repo was cloned at revision "fe00511ad0ad".

** Unknown exception encountered with possibly-broken third-party extension hgview
** which supports versions 3.0 of Mercurial.
** Please disable hgview and try your action again.
** If that fixes the bug please report it to https://www.logilab.org/project/hgview
** Python 2.7.10 (default, Jul 14 2015, 19:46:27) [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)]
** Mercurial Distributed SCM (version 4.1)
** Extensions loaded: hgview
Traceback (most recent call last):
File "/usr/local/bin/hg", line 45, in <module>
File "/Library/Python/2.7/site-packages/mercurial/dispatch.py", line 63, in run
sys.exit((dispatch(request(pycompat.sysargv[1:])) or 0) & 255)
File "/Library/Python/2.7/site-packages/mercurial/dispatch.py", line 129, in dispatch
ret = _runcatch(req)
File "/Library/Python/2.7/site-packages/mercurial/dispatch.py", line 219, in _runcatch
return callcatch(ui, _runcatchfunc)
File "/Library/Python/2.7/site-packages/mercurial/dispatch.py", line 227, in callcatch
return scmutil.callcatch(ui, func)
File "/Library/Python/2.7/site-packages/mercurial/scmutil.py", line 152, in callcatch
return func()
File "/Library/Python/2.7/site-packages/mercurial/dispatch.py", line 208, in _runcatchfunc
return _dispatch(req)
File "/Library/Python/2.7/site-packages/mercurial/dispatch.py", line 761, in _dispatch
if not func.norepo:
AttributeError: 'function' object has no attribute 'norepo'

done in<not specified>
closed by<not specified>