This <https://groups.google.com/forum/#!topic/sage-devel/JuxpFfaKYzA> seems 
seems to be a showstopper, enough to trump the best laid out plans of mice, 
men and mathematicians.

No ticket yet, but I agree that this seems critical. 

Le mardi 18 décembre 2018 12:50:44 UTC+1, E. Madison Bray a écrit :
>
> As pointed out by Samuel last month [1] the transition freeze (i.e. 
> new package versions) for the next major Debian release (buster) is 
> coming up January 12 [2].  This is important for Sage and those 
> working to package Sage for Debian, as it will impact what version of 
> Sage is available in Debian, and by extension big name Debian-based 
> distributions such as Ubuntu and Mint that carry with them probably 
> the majority of users on Linux. 
>
> Setting what version of Sage will be in Debian, prior to the freeze, 
> is not such a big deal in its own right as not many packages depend on 
> Sage.  However, it does impact what versions of Sage's many 
> dependencies can be included, and GAP perhaps has the largest impact 
> there, as there are also many packages that depend on GAP (mostly GAP 
> packages). 
>
> The biggest sticking point right now to packaging Sage for Debian is 
> thus what version of GAP can go in Debian as well (and I don't think 
> the GAP community will be too happy about it if the GAP version gets 
> held back because of Sage; though the more likely outcome there is 
> that Sage gets held back (or excluded entirely) if it can't work with 
> the new GAP). 
>
> Thus some of us have been working hard to find a working convergence 
> between Sage and GAP 4.10.x.  That work is nearly ready [3] (pending 
> some needed patches to GAP), and given the normal rate of Sage's 
> release cycle it would be a shame to have this work excluded from Sage 
> 8.5, considering that it is the major blocker for Debian. 
>
> Therefore I propose doing a few more rounds of Sage 8.5 pre-releases 
> specifically with the focus of upgrading GAP: Completing #22626 which 
> I think will be ready-enough by tomorrow (I would prefer to wait until 
> GAP 4.10.1 is out but starting testing now would be better) and 
> sending it to the patchbots, while putting a hold on any other 
> non-critical fixes. 
>
> If for some reason that's impossible then we should quickly release a 
> Sage 8.6 that is focused primarily on GAP 4.10 compatibility. 
>
> Thanks, 
> Erik 
>
>
>
> [1] https://groups.google.com/d/msg/sage-devel/ztLmB2xWFig/kWk7LGycCQAJ 
> [2] https://release.debian.org/buster/freeze_policy.html 
> [3] https://trac.sagemath.org/ticket/22626 
>

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