[Debian-science-sagemath] Sage broken with Python 2.7.13~rc1-1

[Tobias Hansen]

I started a thread on sage-devel:
https://groups.google.com/forum/#!topic/sage-devel/IbugChsM26E

Until now, no solution. If you want to work on something else than
helping on this one right now, I suggest you downgrade your python2.7
packages. So that we don't get stalled completely..

Best,
Tobias

On 12/06/2016 06:11 PM, Tobias Hansen wrote:
> Actually forget my last mail. It seems to be Issue #5322. In the commit
> there is this new comment in Objects/typeobject.c:
> 
>                     /* Seems to be unsafe, better use
>                        slot_tp_new which will call
>                        tp_new_wrapper which will raise an
>                        exception if it is unsafe. */
> 
> Something like that seems to happen.
> 
> On 12/06/2016 05:53 PM, Ximin Luo wrote:
>> Ouch, nice catch. I actually did notice that a new version of python had been uploaded by running `debian/show-deps.sh by-date` but ignored it because "oh it can't possibly be a python bug". I guess it's worth paying attention to the output of that for the future.
>>
>> X
>>
>> Tobias Hansen:
>>> Actually it looks more related to https://bugs.python.org/issue24469
>>>
>>> From the changelog:
>>> Issue #24469: Fixed memory leak caused by int subclasses without
>>> overridden tp_free (e.g. C-inherited Cython classes).
>>>
>>> And our error happens at tp_free in sage/misc/classcall_metaclass.pyx
>>>
>>> On 12/06/2016 05:32 PM, Tobias Hansen wrote:
>>>> Hi all,
>>>>
>>>> there was an update to python2.7 on Sunday that unfortunately broke
>>>> building or even running sage. The error one gets is this:
>>>>
>>>> TypeError: sage.misc.fast_methods.WithEqualityById.__new__(UnknownClass)
>>>> is not safe, use object.__new__()
>>>>
>>>> In the changelog it of python2.7 there is this entry:
>>>> Issue #5322: Fixed setting __new__ to a PyCFunction inside Python code.
>>>>
>>>> leading to this bug report:
>>>> https://bugs.python.org/issue5322
>>>>
>>>> I just found this, just wanted to let you know why nothing works.
>>>>
>>
> 
> 
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