Why does this leak memory?

[Steve]

When I run this program:

import configparser, sys, gc
def test():
    config=configparser.ConfigParser()
    #del(config)
    #gc.collect()
test()
sys.stderr.write(sys.version)
gc.set_debug(gc.DEBUG_LEAK|gc.DEBUG_STATS)

It reports:

3.2.3 (default, Apr 11 2012, 07:15:24) [MSC v.1500 32 bit (Intel)]gc: 
collecting generation 2...
gc: objects in each generation: 453 258 4553
gc: collectable <ConfigParser 026C0050>
gc: collectable <dict 0264DE40>
gc: collectable <OrderedDict 0200FB78>
gc: collectable <_Link 02713300>
gc: collectable <dict 0264D930>
gc: collectable <weakproxy 026BC180>
gc: collectable <OrderedDict 0200FC10>
gc: collectable <_Link 02713350>
gc: collectable <dict 0264D9C0>
gc: collectable <weakproxy 026BC1B0>
gc: collectable <OrderedDict 0200FCA8>
gc: collectable <_Link 02713378>
gc: collectable <dict 0264DC90>
gc: collectable <weakproxy 026BC210>
gc: collectable <SectionProxy 026C0030>
gc: collectable <dict 0264D5D0>
gc: collectable <_Link 02713328>
gc: collectable <dict 0269D8A0>
gc: collectable <weakproxy 026BC150>
gc: done, 19 unreachable, 0 uncollectable, 0.0000s elapsed.

The leaks can be removed by uncommenting both lines shown.

This strikes me as very odd behaviour.  Can anyone explain it, or is it a 
bug?

Thanks,

S.