empty for-int-in-range loop doesn't behave as in Python

[scoder]

When optimised into a C loop, the for-in-range loop over an empty range still changes the value of the loop variable. In Python, this is not the case.

def go_py_empty():
    i = 20
    for i in range(4,0):
        print u"Spam!"
    return i # == 20

def go_c_empty():
    cdef int i = 20
    for i in range(4,0):
        print u"Spam!"
    return i # == 3

[robertwb]

Works as expected. Committed  http://hg.cython.org/cython-devel/rev/620326b14c3f

This is another reason to keep the for...from syntax though.

[robertwb]

More optimal fix at #243