[arch-dev-public] Packages sometimes fail to build: "Failed to attach XXXX to compat systemd cgroup /user.slice/user-1000.slice/session-c1.scope/payload: No such file or directory"

[Baptiste Jonglez]

Hi,

Today I am experiencing build failures of several packages when using the
devtools:

    $ extra-x86_64-build -- -I ../../another-package/trunk/foo.pkg.tar.xz
    (...)
    ==> Making package: ring-gnome 3:20180112.2.d0bda53-1 (Sun Jan 14 16:06:22 CET 2018)
    ==> Retrieving sources...
      -> Updating ring-client-gnome git repo...
    Fetching origin
    ==> Validating source files with sha256sums...
        ring-client-gnome ... Skipped
    Failed to attach 9683 to compat systemd cgroup /user.slice/user-1000.slice/session-c1.scope/payload: No such file or directory
    Failed to attach 9661 to compat systemd cgroup /user.slice/user-1000.slice/session-c1.scope/supervisor: No such file or directory
    Failed to chown() cgroup /sys/fs/cgroup/systemd/user.slice/user-1000.slice/session-c1.scope/payload: No such file or directory
    Parent died too early
    ==> ERROR: Build failed, check /var/lib/archbuild/extra-x86_64/zorun/build

Full log : https://paste.aliens-lyon.fr/gD0

This is the ring-gnome package in [community] but I had this issue with
another one.  It's not 100% reproducible, but when it happens, all
subsequent builds of the same package exhibit the issue.

My system is fully up-to-date, with kernel 4.14.13-1-ARCH and systemd
236.0-3.  It looks like a bug in systemd, or in the interaction with the
devtools.  This may be caused by the systemd update a few days ago.

Any idea?
Baptiste
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