[Python-Dev] We got leaks!

[Tim Peters]

[Kevin Jacobs]
> First minimal test case:
>
>   class Leaker(object):
>     def __hash__(self): return 1
>
>   for i in range(10):
>       hash( Leaker() )
>       print '*' * 10, 'total refs:', sys.gettotalrefcount()
>
> In the context of the datetime objects, this leak only affects the
> Python version.  It also requires that the Leaker class is a new-style
> object.

Outstanding!  Thanks, Kevin.  I note that this variant shows the same
growth:

x = Leaker()
for i in range(10):
      hash(x)
      print '*' * 10, 'total refs:', sys.gettotalrefcount()

> I'm in the process of isolating the other leak that hits both the
> Python and C verions of datetime in the test_pickling() function,
> though I suspect that may be other incarnations of the above problem.

Possibly.  I'll try to figure out what's going on above first.

> Fun, fun!

The thrill fades a bit after the three hundredth time <wink>.