call control.Delete() occur err=cgroups: unable to remove path "/sys/fs/cgroup/devices/test"

[ycchildcoder]

I write a test，when I call control.Delete() ， it occur error：
err=cgroups: unable to remove path "/sys/fs/cgroup/devices/test"
inside
err= unlinkat /sys/fs/cgroup/devices/test/tasks: operation not permitted
I don't know why， when i remove control.Add(cgroups.Process{Pid: 1234})， it has not error。
thanks

[AkihiroSuda]

Adding os.Remove() before os.RemoveAll() solves the issue?

cgroups/utils.go

Line 153 in 10dcde2

if err := os.RemoveAll(path); err == nil {