[issue28552] Distutils fail if sys.executable is None

[Alexander P]

New submission from Alexander P:

For example, Jython 2.7. When we try to execute `jython-standalone -m pip`, distutils.sysconfig tries to parse sys.executable as a path and obviously fails:

    Traceback (most recent call last):
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/runpy.py", line 161, in _run_module_as_main
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/runpy.py", line 72, in _run_code
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/ensurepip/__main__.py", line 4, in <module>
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/ensurepip/__init__.py", line 220, in _main
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/ensurepip/__init__.py", line 123, in bootstrap
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/ensurepip/__init__.py", line 45, in _run_pip
      File "/tmp/tmp9QnVEm/pip-1.6-py2.py3-none-any.whl/pip/__init__.py", line 10, in <module>
      File "/tmp/tmp9QnVEm/pip-1.6-py2.py3-none-any.whl/pip/util.py", line 13, in <module>
      File "/tmp/tmp9QnVEm/pip-1.6-py2.py3-none-any.whl/pip/backwardcompat/__init__.py", line 115, in <module>
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/distutils/sysconfig.py", line 28, in <module>
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/posixpath.py", line 367, in realpath
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/posixpath.py", line 373, in _joinrealpath
      File "/home/ale/dev/3toj/jython-standalone-2.7.0.jar/Lib/posixpath.py", line 61, in isabs
    AttributeError: 'NoneType' object has no attribute 'startswith'

----------
components: Distutils
messages: 279633
nosy: dstufft, eric.araujo, iamale
priority: normal
severity: normal
status: open
title: Distutils fail if sys.executable is None
type: behavior

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28552>
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