Issue2283

site.py should always be robust to missing settings and follow its default behavior that import-related errors are quietly ignored. The offending code seen in the error reported in http://sourceforge.net/p/jython/mailman/message/33546082/ is found here:

def makepath(*paths):
    dir = os.path.join(*paths)
    if _is_jython and (dir == '__classpath__' or
                       dir.startswith('__pyclasspath__')):
            return dir, dir
    try:
        dir = os.path.abspath(dir)
    except OSError:
        pass
    return dir, os.path.normcase(dir)

That should be easy enough to fix.

Blocker for RC1

I'm wrong, it's not in site.makepath, it's in sysconfig, which is imported by site. The expedient change would be:

_PREFIX = os.path.normpath(sys.prefix) if sys.prefix is not None else None
_EXEC_PREFIX = os.path.normpath(sys.exec_prefix) if sys.exec_prefix is not None else None

However this is not sufficient - most subsequent imports will fail.

The python.home property is nearly essential for Jython so that it can find its standard library. We try to guess, and sometimes we are right, but in general it needs to be set.

Revisit as we get more user feedback.

Fixed as of https://hg.python.org/jython/rev/b0d8aed3a8cd