# Pastebin lu7hQors
$ hg push -r . --traceback
pushing to ssh://hg@foss.heptapod.net/pypy/pypy
searching for changes
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/mercurial/scmutil.py", line 153, in callcatch
    return func()
  File "/usr/lib/python3/dist-packages/mercurial/dispatch.py", line 469, in _runcatchfunc
    return _dispatch(req)
  File "/usr/lib/python3/dist-packages/mercurial/dispatch.py", line 1232, in _dispatch
    return runcommand(
  File "/usr/lib/python3/dist-packages/mercurial/dispatch.py", line 917, in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/usr/lib/python3/dist-packages/hgext/pager.py", line 76, in pagecmd
    return orig(ui, options, cmd, cmdfunc)
  File "/usr/lib/python3/dist-packages/mercurial/dispatch.py", line 1244, in _runcommand
    return cmdfunc()
  File "/usr/lib/python3/dist-packages/mercurial/dispatch.py", line 1230, in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/hgext/mq.py", line 4222, in mqcommand
    return orig(ui, repo, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/home/cfbolz/.local/lib/python3.9/site-packages/hgext3rd/topic/__init__.py", line 1340, in pushoutgoingwrap
    return orig(ui, repo, *args, **opts)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/home/cfbolz/.local/lib/python3.9/site-packages/hgext3rd/topic/flow.py", line 94, in wrappush
    return orig(repo, remote, *args, **newargs)
  File "/usr/lib/python3/dist-packages/mercurial/util.py", line 1867, in check
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/mercurial/commands.py", line 5532, in push
    pushop = exchange.push(
  File "/home/cfbolz/.local/lib/python3.9/site-packages/hgext3rd/evolve/__init__.py", line 573, in push
    return orig(repo, *args, **opts)
  File "/home/cfbolz/.local/lib/python3.9/site-packages/hggit/util.py", line 63, in inner
    return f(*args, **kwargs)
  File "/home/cfbolz/.local/lib/python3.9/site-packages/hggit/__init__.py", line 505, in exchangepush
    return orig(repo, remote, force, revs, newbranch, bookmarks=bookmarks,
  File "/usr/lib/python3/dist-packages/mercurial/exchange.py", line 655, in push
    _pushbundle2(pushop)
  File "/usr/lib/python3/dist-packages/mercurial/exchange.py", line 1307, in _pushbundle2
    ret = partgen(pushop, bundler)
  File "/usr/lib/python3/dist-packages/mercurial/exchange.py", line 1047, in _pushb2ctx
    if not _pushcheckoutgoing(pushop):
  File "/usr/lib/python3/dist-packages/mercurial/exchange.py", line 930, in _pushcheckoutgoing
    discovery.checkheads(pushop)
  File "/usr/lib/python3/dist-packages/mercurial/discovery.py", line 502, in checkheads
    raise error.Abort(errormsg, hint=hint)
mercurial.error.Abort: push creates new remote head c72f0ed1c2be on branch 'py3.7'!
abort: push creates new remote head c72f0ed1c2be on branch 'py3.7'!
(merge or see 'hg help push' for details about pushing new heads)