buildout fails on version 0.14.0

[DavidPesta]

Ubuntu 16.04 $ python3.6 bootstrap.py $ bin/buildout

...
Got zope.pluggableauth 2.3.0.
Getting distribution for 'zope.container'.
Got zope.container 4.2.1.
Getting distribution for 'traceback2'.
/usr/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'project_urls'
  warnings.warn(msg)
/usr/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
  warnings.warn(msg)

Installed /tmp/easy_install-jaoq5aq_/traceback2-1.4.0/.eggs/pbr-4.0.2-py3.6.egg
Got traceback2 1.4.0.
Getting distribution for 'argparse'.
/usr/lib/python3/dist-packages/setuptools/extern/__init__.py:1: UserWarning: Module argparse was already imported from /usr/lib/python3.6/argparse.py, but /tmp/easy_install-gqdxewa0/argparse-1.4.0 is being added to sys.path
  from pkg_resources.extern import VendorImporter
warning: no previously-included files matching '*.pyc' found anywhere in distribution
warning: no previously-included files matching '*.pyo' found anywhere in distribution
warning: no previously-included files matching '*.orig' found anywhere in distribution
warning: no previously-included files matching '*.rej' found anywhere in distribution
no previously-included directories found matching 'doc/_build'
no previously-included directories found matching 'env24'
no previously-included directories found matching 'env25'
no previously-included directories found matching 'env26'
no previously-included directories found matching 'env27'
zip_safe flag not set; analyzing archive contents...
While:
  Installing python.
  Getting distribution for 'argparse'.

An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/buildout.py", line 2127, in main
    getattr(buildout, command)(args)
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/buildout.py", line 797, in install
    installed_files = self[part]._call(recipe.install)
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/buildout.py", line 1557, in _call
    return f()
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.recipe.egg-2.0.5-py3.6.egg/zc/recipe/egg/egg.py", line 221, in install
    reqs, ws = self.working_set()
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.recipe.egg-2.0.5-py3.6.egg/zc/recipe/egg/egg.py", line 84, in working_set
    allow_hosts=self.allow_hosts,
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.recipe.egg-2.0.5-py3.6.egg/zc/recipe/egg/egg.py", line 162, in _working_set
    allow_hosts=allow_hosts)
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/easy_install.py", line 924, in install
    return installer.install(specs, working_set)
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/easy_install.py", line 726, in install
    for dist in self._get_dist(req, ws):
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/easy_install.py", line 570, in _get_dist
    dists = [_move_to_eggs_dir_and_compile(dist, self._dest)]
  File "/home/david/zodbbrowser/zodbbrowser-0.14.0/eggs/zc.buildout-2.11.3-py3.6.egg/zc/buildout/easy_install.py", line 1735, in _move_to_eggs_dir_and_compile
    assert newdist is not None  # newloc above is missing our dist?!
AssertionError

[mgedmin]

This looks like a zc.buildout bug to me.

On the other hand, why try to install argparse on Python 3.6, when argparse is part of the standard library since 2.7? Maybe you can discover whichever package depends on argparse and ask the maintainer to fix that?

Meanwhile I suggest using virtualenv + pip to install zodbbrowser, until this mess is resolved.

[mgedmin]

For the record I cannot reproduce on Ubuntu 17.10, if I run buildout in a virtualenv:

virtualenv -p python3.6 .venv
.venv/bin/python bootstrap.py
bin/buildout

[mgedmin]

I'm closing this because it's a zc.buildout bug with existing workarounds.

[DavidPesta]

virtualenv + pip is a great idea! I'll try that later today. Thanks!