New container build error: mountpoint does not exit

[Richard Henderson]

Hi Eldon,

New this morning are some odd failures in the container build stage, e.g
https://gitlab.com/qemu-project/qemu/-/jobs/4345796216#L235

cgroups: cgroup mountpoint does not exist: unknown

There are several such failures in that pipeline. I've not seen this before, nor was it 
happening yesterday.

Any ideas?


r~