[Bug 4670] New: strange traceback on wrong revset "mercurial-dev%"

[mercurial-bugs at selenic.com]

http://bz.selenic.com/show_bug.cgi?id=4670

          Priority: normal
            Bug ID: 4670
                CC: mercurial-devel at selenic.com
          Assignee: bugzilla at selenic.com
           Summary: strange traceback on wrong revset "mercurial-dev%"
          Severity: bug
    Classification: Unclassified
                OS: Linux
          Reporter: pierre-yves.david at ens-lyon.org
          Hardware: PC
            Status: UNCONFIRMED
           Version: unspecified
         Component: Mercurial
           Product: Mercurial

copy paste error triggers the firework :-/

  % 18:42 pyd at marginatus ~/src/mercurial-dev > hg update mercurial-dev%
  ** Unknown exception encountered with possibly-broken third-party extension
drophack
  ** which supports versions unknown of Mercurial.
  ** Please disable drophack and try your action again.
  ** If that fixes the bug please report it to the extension author.
  ** Python 2.7.9 (default, Mar  1 2015, 12:57:24) [GCC 4.9.2]
  ** Mercurial Distributed SCM (version 3.4+183-d1bd0fd07ee6)
  ** Extensions loaded: color, schemes, convert, rebase, churn, purge,
progress, patchbomb, graphlog, shelve, blackbox, lighthg, smartlog, strip,
histedit, share, evolve, drophack, cpydev, perf, chistedit, extdiff,
remotenames, b2x, activity
  Traceback (most recent call last):
    File "/home/pyd/bin/hg", line 43, in <module>
      mercurial.dispatch.run()
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 29, in run
      sys.exit((dispatch(request(sys.argv[1:])) or 0) & 255)
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 91, in dispatch
      ret = _runcatch(req)
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 160, in _runcatch
      return _dispatch(req)
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 885, in _dispatch
      cmdpats, cmdoptions)
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 646, in runcommand
      ret = _runcommand(ui, options, cmd, d)
    File "/home/pyd/lib/python/mercurial/extensions.py", line 168, in closure
      return func(*(args + a), **kw)
    File "/home/pyd/lib/python/hgext/color.py", line 521, in colorcmd
      return orig(ui_, opts, cmd, cmdfunc)
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 976, in _runcommand
      return checkargs()
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 947, in checkargs
      return cmdfunc()
    File "/home/pyd/lib/python/mercurial/dispatch.py", line 882, in <lambda>
      d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
    File "/home/pyd/lib/python/mercurial/util.py", line 716, in check
      return func(*args, **kwargs)
    File "/home/pyd/lib/python/mercurial/extensions.py", line 168, in closure
      return func(*(args + a), **kw)
    File "/home/pyd/lib/python/mercurial/util.py", line 716, in check
      return func(*args, **kwargs)
    File "/home/pyd/src/mutable-history/hgext/evolve.py", line 626, in
wrapmayobsoletewc
      res = origfn(ui, repo, *args, **opts)
    File "/home/pyd/lib/python/mercurial/util.py", line 716, in check
      return func(*args, **kwargs)
    File "/home/pyd/lib/python/mercurial/commands.py", line 6382, in update
      rev = scmutil.revsingle(repo, rev, rev).rev()
    File "/home/pyd/lib/python/mercurial/scmutil.py", line 671, in revsingle
      l = revrange(repo, [revspec])
    File "/home/pyd/lib/python/mercurial/scmutil.py", line 774, in revrange
      l = m(repo)
    File "/home/pyd/lib/python/mercurial/revset.py", line 2519, in mfunc
      result = getset(repo, subset, tree)
    File "/home/pyd/lib/python/mercurial/revset.py", line 316, in getset
      s = methods[x[0]](repo, subset, *x[1:])
    File "/home/pyd/lib/python/mercurial/revset.py", line 1327, in only
      include = getset(repo, fullreposet(repo), args[0])
    File "/home/pyd/lib/python/mercurial/revset.py", line 316, in getset
      s = methods[x[0]](repo, subset, *x[1:])
  KeyError: 'minus'
  zsh: exit 1     hg update mercurial-dev%

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