reversed(range(start, stop, step)) is wrong

[robertwb]

When iterating over reversed(range()), the reversed swaps the bounds of the range() and offsets it by one. This is wrong for a step that is not 1 or -1. Example:

cdef int i
for i in reversed(range(0, 10, 4)):
    print i

print list(reversed(range(0, 10, 4)))

output:

9
5
1
[4, 0](8,)

Migrated from http://trac.cython.org/ticket/763

[robertwb]

scoder changed owner from somebody to scoder I've disabled the optimised looping for this case:

https://github.com/cython/cython/commit/f766a7fc2a4b7fa67b2db8592034980bff9c5783

[robertwb]

scoder changed resolution to fixed status from new to closed Follow-up ticket for optimising this case is in http://cython.trac.org/ticket/765.