Error on content disconnect in autopkgtests

[Sergio Schvezov]

When running autopkgtests, one of our tests that works well on GCE, produces the following error that I extracted from the logs[1]:
- Disconnect gtk3-hello:gnome-3-28-1804 from gnome-3-28-1804:gnome-3-28-1804 (cannot update mount namespace of snap "gtk3-hello": cannot update preserved namespace of snap "gtk3-hello": cannot update snap namespace: cannot create writable mimic over "/usr/share": no such file or directory)

If useful as a data point, this used to work fine circa 2 months ago.

[1] https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-bionic-snappy-dev-snapcraft-daily/bionic/amd64/s/snapcraft/20200911_040906_521c2@/log.gz

[Ian Johnson (anonymouse67)]

Sergio is this reproducible in the autopkgtest environment?

[Sergio Schvezov (sergiusens)]

Yes, this shows up every time we trigger our upstream test suite on that architecture

[Launchpad Janitor (janitor)]

[Expired for snapd because there has been no activity for 60 days.]