He, roundup ate part of the code I pasted. Here it is again:

>>> import io
[39516 refs]
>>> f = io.open("foo", "wb", buffering=0)
[39542 refs]
>>> f.truncate()
0L
[39544 refs]
>>> f.truncate()
0L
[39544 refs]
>>> f.truncate(2)
2
[39543 refs]
>>> f.truncate(2)
2
[39542 refs]
>>> while True: f.truncate(2)
... 
[snip]
Erreur de segmentation