Octave Instability

Hello, I do not know if this has been dealt with, or if other people have found other workarounds for it, but why is 2.9.9 so unstable? Even a simple octave:1> t=linspace(0,2*pi);y=sin(t);plot(t,y) panic: Segmentation fault -- stopping myself... attempting to save variables to `octave-core'... leads to a seg. fault. Does everyone who uses Octave via MacPorts have this issue? Thank you for your input with this. -Anthony