Message3277

This bug is actually invalid -- basically it lets futures 'leak' into 
other imported modules, which although is a solution to this problem, 
causes other problems (see #1886758 for an example).

So we can't support this -- CPython 2.2 doesn't support this leaking of 
futures either. Basically simplejson needs to import generators from 
future itself, or it's just not 2.2 compatible:

Python 2.2.3 (#1, Sep 19 2007, 11:27:07) 
[GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from __future__ import generators
>>> import simplejson.scanner
simplejson/scanner.py:56: Warning: 'yield' will become a reserved 
keyword in the future
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "simplejson/__init__.py", line 112, in ?
    from decoder import JSONDecoder
  File "simplejson/decoder.py", line 7, in ?
    from simplejson.scanner import Scanner, pattern
  File "simplejson/scanner.py", line 56
    yield rval, matchend
             ^
SyntaxError: invalid syntax
>>> 

i've reverted this part of the patch in trunk