[Bug 1824523] [NEW] Assertion error during iso build

[Andreas Hasenack]

Public bug reported:

>From https://launchpadlibrarian.net/418949790/buildlog_ubuntu_disco_amd64_ubuntu-server-live_BUILDING.txt.gz:
Processing triggers for initramfs-tools (0.131ubuntu18) ...
apt-esm-hook: hook.cc:186: int main(int, char**): Assertion `ppid == getppid_of("self")' failed.
Aborted (core dumped)
E: Problem executing scripts APT::Install::Post-Invoke-Success '[ ! -f /usr/lib/ubuntu-advantage/apt-esm-hook ] || /usr/lib/ubuntu-advantage/apt-esm-hook'
E: Sub-process returned an error code
E: config/hooks/032-installer-squashfs.binary failed (exit non-zero). You should check for errors.
P: Begin unmounting filesystems...
P: Saving caches...
P: Begin unmounting filesystems...
P: Saving caches...
Build failed

Upstream fix: https://github.com/CanonicalLtd/ubuntu-advantage-
client/pull/362/files

** Affects: ubuntu-advantage-tools (Ubuntu)
     Importance: Critical
     Assignee: Andreas Hasenack (ahasenack)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1824523

Title:
  Assertion error during iso build

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