[Cython] Cython 0.26 release

[Robert Bradshaw]

On Wed, Jun 21, 2017 at 9:59 AM, Jeroen Demeyer <jdemeyer at cage.ugent.be> wrote:
> On 2017-06-21 17:44, Robert Bradshaw wrote:
>>
>> Is it cdef->cpdef, or something else?
>
> Yes, it is.
>
>> It's possible that the error needs to be made narrower, but I'd really
>> like to avoid incorrect code that could lead to wrong methods being
>> called.
>
> Fine... we can still patch Cython in Sage.

I suppose in that case we just got lucky that no one cimported these
classes and tried to use methods after this point in the vtable...