cascaded assignments mixed with complete sequence assignments have side-effects

[scoder]

This code:

cdef int ai,bi
ai, bi = c = [intval(1), intval(2)]
print ai, bi, c

cdef int intval(int x):
    return x

evaluates intval() four times instead of twice: once when building the list and once when assigning to ai/bi.

[scoder]

Fixed here:

 http://hg.cython.org/cython-devel/rev/9756a762a5c8