[Python-modules-team] Bug#821223: Unable to create a virtualenv: invalid requirement: '_markerlib'

[Vincent Bernat]

Package: virtualenv
Version: 15.0.1+ds-1
Severity: grave

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Hey!

For some reason, I now get the following error message when trying to
initialize a new virtualenv:

virtualenv --no-site-packages tip
Running virtualenv with interpreter /usr/bin/python2
New python executable in /home/bernat/tmp/tip/bin/python2
Also creating executable in /home/bernat/tmp/tip/bin/python
Installing setuptools, pkg_resources, _markerlib, pip, wheel...
  Complete output from command /home/bernat/tmp/tip/bin/python2 - setuptools pkg_resources _markerlib pip wheel:
  Invalid requirement: '_markerlib'
Traceback (most recent call last):
  File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_install.py", line 77, in __init__
    req = pkg_resources.Requirement.parse(req)
  File "/home/bernat/tmp/tip/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 2806, in parse
    req, = parse_requirements(s)
  File "/home/bernat/tmp/tip/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 2754, in parse_requirements
    yield Requirement(line)
  File "/home/bernat/tmp/tip/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 2763, in __init__
    raise RequirementParseError(str(e))
RequirementParseError: Invalid requirement, parse error at "'_markerl'"

- ----------------------------------------
...Installing setuptools, pkg_resources, _markerlib, pip, wheel...done.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/virtualenv.py", line 2364, in <module>
    main()
  File "/usr/lib/python3/dist-packages/virtualenv.py", line 719, in main
    symlink=options.symlink)
  File "/usr/lib/python3/dist-packages/virtualenv.py", line 989, in create_environment
    download=download,
  File "/usr/lib/python3/dist-packages/virtualenv.py", line 918, in install_wheel
    call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
  File "/usr/lib/python3/dist-packages/virtualenv.py", line 812, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /home/bernat/tmp/tip/bin/python2 - setuptools pkg_resources _markerlib pip wheel failed with error code 1



I get the same problem with "python -m virtualenv".

- -- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (101, 'experimental-debug'), (101, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.5.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages virtualenv depends on:
ii  python3             3.5.1-3
ii  python3-virtualenv  15.0.1+ds-1

virtualenv recommends no packages.

virtualenv suggests no packages.

- -- no debconf information

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