Hi, I have found an unhandled SIGFPE in number_field_element_quadratic as explained in ticket http://trac.sagemath.org/sage_trac/ticket/9357
Basically, sage does not check if a quadratic algebraic number is zero when trying to invert it. I added a trivial patch that checks if the zero element is being inverted to rise a ZeroDivisionError. However, the error message before the crash suggests that the compiled code is not properly wrapped with _sig_on _sig_off. In this example even if one adds this wrapper the zero check is advisable, since _sing_on would rise a RuntimeError instead a ZeroDivisionError, so it seems that the zero check is enough in this case. On the other hand would the _sig_on stuff made the code more robust? What is the way to proceed in this cases? Thanks, Luis -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
