Unmounting fails for local builds

[Heinrich Schuchardt]

livecd-rootfs creates non-private mounts. When building locally using
the auto/build script unmounting fails.

To unmount dev/pts it is insufficient to make the mount private. Its
parents must be private too.

Please, change teardown_mountpoint() accordingly. Patch appended.

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "0001-functions-fix-unmounting-for-local-builds.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Heinrich Schuchardt (xypron)]

https://code.launchpad.net/~xypron/livecd-rootfs/+git/livecd-rootfs/+merge/412645

[William Wilson (jawn-smith)]

I had to revert this change as it was causing failures in autopkgtests. Can you look into a method for fixing this that doesn't cause autopkgtest failures?

[Launchpad Janitor (janitor)]

This bug was fixed in the package livecd-rootfs - 2.751

---------------
livecd-rootfs (2.751) jammy; urgency=medium

  * Revert patch for unmounting in local builds as it is causing autopkgtest
    regressions

 -- William 'jawn-smith' Wilson <email address hidden> Wed, 12 Jan 2022 13:43:24 -0600