Source: python2.7 Severity: important Version: 2.7.13~rc1-1 Control: forwarded -1 https://bugs.python.org/issue5322#msg282852
Dear maintainer, the fix for Python issue #5322 that was included in Python 2.7.13rc1 breaks backwards compatibility [1]. Another Python change that broke backwards compatibility in the same way was reverted for that reason a while ago [2], so I hope this change will also eventually be reverted or changed upstream. The problem is, this breaks SageMath, which we wanted to upload to NEW this weekend in order to have it included in Stretch. We are also trying to find a workaround on the Sage side in [3], but this seems to be very complicated. SageMath uses inheritance with cdef classes hundreds of times, and all these cases would need to be fixed to pass the new stricter check of Python. Can we revert this change in the next few days please? I will attach a patch to this bug report later today. Best, Tobias [1] https://bugs.python.org/issue5322#msg282852 [2] https://bugs.python.org/issue25731#msg262922 [3] https://trac.sagemath.org/ticket/22037
