To summarize the ticket, this was a bug in Pari that was fixed by updating from 2.11.1 to 2.11.2. If it is still showing up on some architectures, that may have to go to upstream.
One way to test this would be to directly install Pari 2.11.2 on your machine and try this test directly: ? hyperellcharpoly(Mod(x^10 + x^9 + x^8 + x, 3)) %1 = x^8 + 2*x^7 + 6*x^6 + 9*x^5 + 18*x^4 + 27*x^3 + 54*x^2 + 54*x + 81 Kiran On Friday, January 10, 2020 at 10:56:55 AM UTC-8, slelievre wrote: > > Seems related to > > - Sage Trac ticket 28789 > Zeta functions of hyperelliptic curves giving wrong answers > https://trac.sagemath.org/ticket/28789 > <https://www.google.com/url?q=https%3A%2F%2Ftrac.sagemath.org%2Fticket%2F28789&sa=D&sntz=1&usg=AFQjCNHezOaXmNMD158zChprrwzR3jBBCA> > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/7fdddfe8-c0c5-464d-9a2c-3733fe4383b5%40googlegroups.com.
