Comment 29 for bug 1979244

> - a phased update that has a version in security

I see there is code here to special-case security updates, and there are also added tests for the scenario where there is a phased update in -security with a PUP of 0. Can you please clarify why you thought this necessary to implement? As an archive policy, all packages released to the security pocket are phased immediately to 100%, and in the exceptional case that we set the phasing to 0 for a package in the security pocket (instead of simply removing it in case of a problem), I would expect apt to honor that.