Hello sage-devel, I got this from the "report a problem" bugreport
(observed on sagenb.org) and I can confirm this using sage 4.5, ubuntu
10.4, intel 32bit
The problem is that a big integer expression is not converted
correctly to a Python 'int'
sage: z = var('z'); f(z) = z^2 + 1
sage: def ppol(n,z):
g = f(z)
for i in range(0, n-1):
g = f(g)
return g
sage: h = ppol(9,1)
sage: h
3791862310265926082868235028027893277370233152247388584761734150717768254410341175325352026
sage: type(h)
<type 'sage.symbolic.expression.Expression'>
sage: ZZ(h)
3791862310265926082868235028027893277370233152247388584761734150717768254410341175325352026
sage: int(h)
3791862310265926082868235028028848611706634562188571520717816257498752565976400597161607168L
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