* Sébastien Villemot <sebastien@debian.org> [2018-07-05 22:24]:
No, packages are supposed to be buildable as long as Build-Depends and Build-Conflicts are satisfied. So I agree with Olivier that this is a bug, which should be fixed either it dh-octave or in octave-interval by adding a "Build-Conflicts: octave-interval" (the latter admittedly not being very elegant).
Okay, let us fix it in dh-octave then. Rafael