I haven't looked deeply into this at all, so it could be very easy pickings for someone who knows the coercion model (i.e. robert or david roe). something goes awry when you add an int to a matrix over a finite field, and one of the entries becomes 0. this is trac 1374, and here's the sample session there:
sage: M = MatrixSpace(GF(5),2,2) sage: A = M([1,0,0,1]) sage: A - int(-1) [2 0] [0 2] sage: B = M([4,0,0,1]) sage: B - int(-1) ------------------------------------------------------------ Unhandled SIGBUS: A bus error occured in SAGE. This probably occured because a *compiled* component of SAGE has a bug in it (typically accessing invalid memory) or is not properly wrapped with _sig_on, _sig_off. You might want to run SAGE under gdb with 'sage -gdb' to debug this. SAGE will now terminate (sorry). ------------------------------------------------------------ -cc --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://sage.scipy.org/sage/ and http://modular.math.washington.edu/sage/ -~----------~----~----~----~------~----~------~--~---
