Comment 14 for bug 1654025

string vs. float comparison makes sense indeed. It could also be that by testpkg-reboot/'s nature, rebooting is pretty much the first thing it does, so it could happen that the uptime before reboot is even smaller than the first time we check after reboot -- but that's a bit academic in practice.

This works fairly well now, so I pushed this with a small addition to get_uptime() to redirect stderr to /dev/null. Otherwise you get some potentially misleading "error: Container is not running." messages. Thanks!