[Bug 4434] New: traceback when evolving the working copy parent and the parent is pruned

[mercurial-bugs at selenic.com]

http://bz.selenic.com/show_bug.cgi?id=4434

          Priority: normal
            Bug ID: 4434
                CC: mercurial-devel at selenic.com
          Assignee: bugzilla at selenic.com
           Summary: traceback when evolving the working copy parent and
                    the parent is pruned
          Severity: bug
    Classification: Unclassified
                OS: Linux
          Reporter: pierre-yves.david at ens-lyon.org
          Hardware: PC
            Status: UNCONFIRMED
           Version: unspecified
         Component: evolution
           Product: Mercurial

(reported by Rémi Cardona)

  ** Unknown exception encountered with possibly-broken third-party extension
crecord
  ** which supports versions unknown of Mercurial.
  ** Please disable crecord and try your action again.
  ** If that fixes the bug please report it to the extension author.
  ** Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48) [GCC 4.4.5]
  ** Mercurial version 2.5.1+3-227479f61db9, système de gestion de sources
distribué
  ** Extensions chargées : schemes, churn, color, convert, crecord, evolve,
graphlog, hgview, histedit, mq, pager, patchbomb, progress, purge, rebase,
record, transplant, guestrepo
  Traceback (most recent call last):
    File "/home/rcardona/Projects/hg/hg", line 38, in <module>
      mercurial.dispatch.run()
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 28, in run
      sys.exit((dispatch(request(sys.argv[1:])) or 0) & 255)
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 65, in
dispatch
      return _runcatch(req)
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 88, in
_runcatch
      return _dispatch(req)
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 743, in
_dispatch
      cmdpats, cmdoptions)
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 514, in
runcommand
      ret = _runcommand(ui, options, cmd, d)
    File "/home/rcardona/Projects/hg/mercurial/extensions.py", line 189, in
wrap
      return wrapper(origfn, *args, **kwargs)
    File "/home/rcardona/Projects/hg/hgext/pager.py", line 130, in pagecmd
      return orig(ui, options, cmd, cmdfunc)
    File "/home/rcardona/Projects/hg/mercurial/extensions.py", line 189, in
wrap
      return wrapper(origfn, *args, **kwargs)
    File "/home/rcardona/Projects/hg/hgext/color.py", line 394, in colorcmd
      return orig(ui_, opts, cmd, cmdfunc)
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 833, in
_runcommand
      return checkargs()
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 804, in
checkargs
      return cmdfunc()
    File "/home/rcardona/Projects/hg/mercurial/dispatch.py", line 740, in
<lambda>
      d = lambda: util.checksignature(func)(ui, *args, **cmdoptions)
    File "/home/rcardona/Projects/hg/mercurial/util.py", line 475, in check
      return func(*args, **kwargs)
    File "/home/rcardona/Projects/hg/mercurial/extensions.py", line 144, in
wrap
      util.checksignature(origfn), *args, **kwargs)
    File "/home/rcardona/Projects/hg/mercurial/util.py", line 475, in check
      return func(*args, **kwargs)
    File "/home/rcardona/Projects/hg/hgext/mq.py", line 3508, in mqcommand
      return orig(ui, repo, *args, **kwargs)
    File "/home/rcardona/Projects/hg/mercurial/util.py", line 475, in check
      return func(*args, **kwargs)
    File "/home/rcardona/Projects/hgext/mutable-history/hgext/evolve.py", line
910, in evolve
      return _solveunstable(ui, repo, tr, opts['dry_run'])
    File "/home/rcardona/Projects/hgext/mutable-history/hgext/evolve.py", line
966, in _solveunstable
      obs = orig.parents()[1]
  IndexError: list index out of range

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