Dear maintainer(s),

Your package has an autopkgtest, great. However, it fails all its tests
everywhere (where I looked), albeit not showing up as such because all
tests are marked flaky. On some architectures, the tests take quite some
time and as because the flaky restriction the result doesn't have much
value, so that's a waste of resources.

I've added rust-cargo to the ci.d.n reject_list and will run manual
tests when contacted and remove the block once this issue is fixed.

Paul