% hg --traceback up
Traceback (most recent call last):
  File "mercurial\cmdutil.pyc", line 37, in runcatch
  File "mercurial\cmdutil.pyc", line 378, in dispatch
  File "mercurial\cmdutil.pyc", line 431, in runcommand
  File "mercurial\cmdutil.pyc", line 387, in checkargs
  File "mercurial\cmdutil.pyc", line 370, in <lambda>
  File "mercurial\commands.pyc", line 2677, in update
  File "mercurial\hg.pyc", line 246, in update
  File "mercurial\merge.pyc", line 544, in update
  File "mercurial\merge.pyc", line 65, in checkunknown
  File "mercurial\context.pyc", line 419, in unknown
  File "mercurial\context.pyc", line 375, in __getattr__
  File "mercurial\localrepo.pyc", line 874, in status
  File "mercurial\localrepo.pyc", line 835, in fcmp
  File "mercurial\filelog.pyc", line 79, in cmp
  File "mercurial\filelog.pyc", line 60, in renamed
  File "mercurial\filelog.pyc", line 38, in _readmeta
  File "mercurial\revlog.pyc", line 924, in revision
  File "mercurial\revlog.pyc", line 868, in chunk
  File "mercurial\revlog.pyc", line 865, in loadcache
  File "mercurial\util_win32.pyc", line 256, in read