example of whiteouts being weird w/ overlay

gistfile1.txt

root@bincastle-dev:/home/sipsma/tmp/wh-issue# ls
root@bincastle-dev:/home/sipsma/tmp/wh-issue# mkdir -p lower1/foo lower2/foo upper work merged
root@bincastle-dev:/home/sipsma/tmp/wh-issue# mknod lower1/foo/wh c 0 0
root@bincastle-dev:/home/sipsma/tmp/wh-issue# mknod lower1/foo/other-device c 0 1
root@bincastle-dev:/home/sipsma/tmp/wh-issue# mount overlay -t overlay -o lowerdir=lower1,upperdir=upper,workdir=work merged/
root@bincastle-dev:/home/sipsma/tmp/wh-issue# ls -la merged/foo/
ls: cannot access 'merged/foo/wh': No such file or directory
total 8
drwxr-xr-x 2 root root 4096 Aug  4 12:22 .
drwxr-xr-x 1 root root 4096 Aug  4 12:21 ..
crw-r--r-- 1 root root 0, 1 Aug  4 12:22 other-device
c????????? ? ?    ?       ?            ? wh
root@bincastle-dev:/home/sipsma/tmp/wh-issue# umount merged/
root@bincastle-dev:/home/sipsma/tmp/wh-issue# mount overlay -t overlay -o lowerdir=lower1:lower2,upperdir=upper,workdir=work merged/
root@bincastle-dev:/home/sipsma/tmp/wh-issue# ls -la merged/foo/
total 8
drwxr-xr-x 1 root root 4096 Aug  4 12:22 .
drwxr-xr-x 1 root root 4096 Aug  4 12:21 ..
crw-r--r-- 1 root root 0, 1 Aug  4 12:22 other-device