Package: sbuild Version: 0.77.1-1 Severity: important File: /usr/bin/sbuild-createchroot
sbuild-createchroot runs debootstrap with neither --merged-usr nor --no-merged-usr, so debootstrap will choose whether to merge /usr according to its defaults. The production Debian infrastructure currently runs on Debian stretch, where sbuild-createchroot will generate traditional chroots without merged /usr. However, if you install sbuild on a buster or sid system, debootstrap with no special options will create buster and sid chroots with merged /usr. This will start to happen on the production Debian infrastructure as it gets upgraded from stretch to buster, so before buster freezes we should make sure the right things are going to happen. Some packages are misbuilt when built in a merged /usr chroot, for example quilt <https://bugs.debian.org/913226>. That's a bug in those packages (possibly a RC bug - I'm going to query that with the release team), but the conservative approach would be for sbuild-createchroot to avoid this class of bug in buildd-built packages by using traditional (unmerged /usr) chroots. It can do this by depending on debootstrap (>= 1.0.83) (which is in stretch but not jessie) and passing the --no-merged-usr option. Depending on the level of testing done, number of bugs found and fixed, and level of adoption of merged /usr, we could assess whether to revert that change after buster is released. smcv
