we have this reported on https://trac.sagemath.org/ticket/25391 and resolved by upgrading to python 3.6.6 (see https://trac.sagemath.org/ticket/25771) which should be in the upcoming beta.
-- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
