Comment 2 for bug 1824523

This still fails for me:

http://paste.ubuntu.com/p/vdN9dBxKBr/

....
Building bootmap in '/boot'
Adding IPL section 'ubuntu' (default)
Preparing boot device: vda (0000).
Done.
apt-esm-hook: hook.cc:184: 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
Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
TIMED subp(['udevadm', 'settle']): 0.056
Running command ['umount', '/target/sys'] with allowed return codes [0] (capture=False)
Running command ['umount', '/target/proc'] with allowed return codes [0] (capture=False)
Running command ['umount', '/target/dev'] with allowed return codes [0] (capture=False)
finish: cmd-install/stage-curthooks/builtin/cmd-curthooks/installing-kernel: FAIL: installing kernel
finish: cmd-install/stage-curthooks/builtin/cmd-curthooks: FAIL: curtin command curthooks
Traceback (most recent call last):
 ...
curtin.util.ProcessExecutionError: Unexpected error while running command.

Note this is the new code, as in it's now asserting in hook.cc:184 which the new line where the assert has moved.

I wonder if these things are racy or something.

At the moment, this fails whilst trying to install the kernel, when running subiquity -> curtin on s390x. With ubuntu-advantage-tools 19.3 everywhere.