[Python-Dev] stack check on Unix: any suggestions?

[Vladimir Marangozov]

Guido van Rossum wrote:
> 
> Please try this again on various platforms with this version:
> 
>     i = 0
>     class C:
>       def __getattr__(self, name):
> 	  global i
> 	  print i
> 	  i += 1
> 	  return self.name # common beginners' mistake
> 
>     C() # This tries to get __init__, triggering the recursion
> 

            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Are you sure?

Although strange, this is not the case and instantiating C succeeds
(try "python rec.py", where rec.py is the above code).

A closer look at the code shows that Instance_New goes on calling
getattr2 which calls class_lookup, which returns NULL, etc, etc,
but the presence of __getattr__ is not checked in this path.

-- 
       Vladimir MARANGOZOV          | Vladimir.Marangozov@inrialpes.fr
http://sirac.inrialpes.fr/~marangoz | tel:(+33-4)76615277 fax:76615252