[pypy-issue] Issue #2385: Missing __self__ from super objects (pypy/pypy)

[David MacIver]

New issue 2385: Missing __self__ from super objects
https://bitbucket.org/pypy/pypy/issues/2385/missing-__self__-from-super-objects

David MacIver:

```python
class Foo(object):
    pass

x = Foo()

assert super(Foo, x).__self__ is x
```

This works on CPython 2.7 but on pypy 3.5.1 it errors with 

```
Traceback (most recent call last):
  File "superior.py", line 6, in <module>
    assert super(Foo, x).__self__ is x
AttributeError: 'super' object has no attribute '__self__'
```

What's weird is this seems to be a regression. I don't currently have an old pypy around to test on but I found this because code that was working on pypy 2.6.1 started breaking when I upgraded my build to 3.5.1