[Axiom-developer] bug 7195

[daly]

If I do:
)set system functioncode on
)set system optimization on
)set function compile off
draw(surface(x,x*x,y),x=0..5,z=0..3)

I get the failure
  >>System error:
  The variable |y| is unbound.

So clearly, in the highly optimized compiler code, this variable
is freely referenced and unbound at run time causing the segmentation
violation. Turning compilation off can catch it.

Tim