Basic misunderstanding on object creation

[Terry Reedy]

On 5/13/2015 12:38 PM, Mark Lawrence wrote:

> I'm completely convinced that I've seen a change go through on the bug
> tracker that impacts on this area, but many months if not years ago.
> Unfortunately searching the bug tracker for super, __new__, __init__ and
> so on gets a lot of hits, leaving my Mk1 eyeballs overworked.  At least
> I've tried but sorry, had to give up :(

 From my post, sent while you were composing this. (It took me awhile to 
find it.)

Bugfixes break code that depends on buggy behavior. See
https://bugs.python.org/issue1683368
Your code also fails in 2.7.9 if you inherit Foo from object.
The exact error messages changed for 3.4 in
https://bugs.python.org/issue7963

(Found by searching https://docs.python.org/3.4/whatsnew/changelog.html
for 'object'. selecting 'Highlight All', and scanning Core and Builtins 
sections. I believe the change went into some 2.7.x release, as well as 
3.3.0a1)
-- 
Terry Jan Reedy