Version 3.0.0 of the control package is failing in several unit tests on an i386 Debian system.  HEre is a sumamry of the failing tests:

@lti/minreal.m:
%! assert (Ar, Ae, 1e-4);
%! assert (Br, Be, 1e-4);
%! assert (Er, Ee, 1e-4);

hnamodred.m:
%! assert (Info.hsv, HSVe, 1e-4);

ltimodels.m:
%! assert (ac, ac_e, 1e-4);
%! assert (ec, ec_e, 1e-4);
%! assert (bc, bc_e, 1e-4);
%! assert (cc, cc_e, 1e-4);
%! assert (q, q_e, 1e-4);
%! assert (z, z_e, 1e-4);
%! assert (ao, ao_e, 1e-4);
%! assert (eo, eo_e, 1e-4);
%! assert (bo, bo_e, 1e-4);
%! assert (q, q_e, 1e-4);
%! assert (z, z_e, 1e-4);

You can find the full log in this URL:
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/i386/octave-control.html

Many of the errors seem to be sign inversions, but others are simply numerically wrong.