Bug#1020576: please update sage for pari 2.15.0 and gap 4.12.0

[Tobias Hansen]

Hi Rogo,

awesome, that helps a lot! Thanks for figuring all this out. I had already 
started determining which patches need to be applied, but wasn't finished yet.

Could you please file a bug against giac to get the uchar issue fixed?

Best,
Tobias