[sage-support] in_integral_domain not implemented for SR

Hello, I recently upgraded sage to the binary version 4.6.2 for Ubuntu i586, and ran into the following error: sage: (r,s,t,c,d,p,q) = var( 'r,s,t,c,d,p,q' ) sage: A = matrix( [ [r, -s, r, -s], [t, 0, t-p, -p], [r, -s-c, r, -s-d], [t, -c, t-q, -q-d] ] ) sage: A [ r -s r -s] [

[sage-support] Building error on Pari

Hello,    I downloaded the source version of Sage and I ran into this error while building: gcc  -c -O3 -Wall -fno-strict-aliasing -fomit-frame-pointer  -O3 -g -I. -I../src/headers -fPIC -o base3.o ../src/basemath/base3.c gcc: Internal error: Killed (program cc1) Please submit a full bug report.