sre.finditer break down: is this a bug?

[Jane Austine]

Newly added function sre.finditer and (matchedObject.)finditer
break down and the system crushes on win32 when requested for
next() after StopIteration.

see:
>> import sre
>> fi=sre.finditer(r'\s','a b')
>> fi.next()
>> fi.next()
>> fi.next() #system halts for ever.