lsum?



This seems like a bug in lsum:

gg : x^3+t*x^2-3*x-2*t$
lsum(gg*t,t,rootsof(t^2+1));
->
?%lsum(gg*t,t,rootsof(t^2+1))$

Shouldn't gg be substituted?  How can I do this?

(The 1D display of lsum needs work too.)

Ray