Seems like a bug in integrate



(in 5) integrate(1/(x^2+1)*exp(-%i*%pi*x*t),x,minf,inf);
Is  t  positive, negative, or zero?

p;
                                                                     - %pi t
(out5)                                                         %pi %e
(in 6) integrate(%*exp(%i*%pi*x*t),t,minf,inf);

Maxima encountered a Lisp error:

 Unhandled kernel in tvar-lim

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
(in 7)