Error copying directory with sockets despite sockets skipped

[hobti01]

When copying with copy.Options to skip sockets, receive the following error with 1.14.1, but no error with 1.14.0:

error: lstat /var/mnt/a.sock: operation not supported

We attempting to copy a directory with copy.Options as follows:

opts := copy.Options{
	Skip: func(info os.FileInfo, src, dest string) (bool, error) {
		if info.Mode().Type() == fs.ModeSocket {
			return true, nil
		}
	}
}
err := cp.Copy("/var/mnt", "/tmp", opts)
if err != nil {
	fmt.Println("Error:", err)
}

Now the special circumstances:

• code is running in a docker container and accessing files that are mounted from the host (MacOS) to the container
  • we don't see any problem in unit tests with sockets when the socket is not mounted into a container
• if the files in the mount are queried before using copy, e.g. ls /var/mnt, then copy does work as expected

Is there something we're doing incorrectly or could change to have lstat work?

[otiai10]

Thanks a lot. Could you provide a reproducible Dockerfile?