I did manage to reproduce it with the PARI-in-Sage by running the attached GP script in Sage:
sage: pari('read("/tmp/bug.gp")') --------------------------------------------------------------------------- PariError Traceback (most recent call last) <ipython-input-1-d8453d83569e> in <module>() ----> 1 pari('read("/tmp/bug.gp")') cypari2/pari_instance.pyx in cypari2.pari_instance.Pari.__call__() cypari2/gen.pyx in cypari2.gen.objtogen() cypari2/handle_error.pyx in cypari2.handle_error._pari_err_handle() PariError: nffactor: bug in LLL_cmbf [no factor], please report -- 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 post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
bug.gp
Description: application/gnuplot