[Bug 1952921] [NEW] Unmounting fails for local builds

[Heinrich Schuchardt]

Public bug reported:

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.

** Affects: livecd-rootfs (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: fr-1894

** Patch added: "0001-functions-fix-unmounting-for-local-builds.patch"
   https://bugs.launchpad.net/bugs/1952921/+attachment/5544660/+files/0001-functions-fix-unmounting-for-local-builds.patch

** Tags added: fr-1894

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https://bugs.launchpad.net/bugs/1952921

Title:
  Unmounting fails for local builds

Status in livecd-rootfs package in Ubuntu:
  New

Bug description:
  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.

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