Preconditions/Environment
-------------------------
Ubuntu 18.04.4 LTS (Bionic Beaver)
pseudo at commit 060058b
With 0001-pseudo_ipc.h-Fix-enum-typedef.patch from poky(http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=b4e1ce1b93b08c77047508f27915073db6315a8e) applied.

Triggering Action/Cause
-----------------------
Run `pseudo`.
Run `mkdir foobar`.
Run `setfacl -m "u:root:rX" foobar`.

Expectation
-----------
UID/GID of foobar should be 0/root.

`stat foobar`:
  File: foobar/
  Size: 4096      	Blocks: 8          IO Block: 4096   directory
...
Access: (0775/drwxrwxr-x)  Uid: (    0/    root)   Gid: (    0/    root)
...

`getfacl foobar`:
# file: foobar/
# owner: root
# group: root
user::rwx
user:root:r-x
group::rwx
mask::rwx
other::r-x

Actual Result
-------------
UID/GID of foobar is 1001/jbe, the user running pseudo.

`getfacl foobar`:
# file: foobar/
# owner: jbe
# group: jbe
user::rwx
user:root:r-x
group::rwx
mask::rwx
other::r-x

`stat foobar`:
  File: foobar/
  Size: 4096      	Blocks: 8          IO Block: 4096   directory
...
Access: (0755/drwxr-xr-x)  Uid: ( 1001/     jbe)   Gid: ( 1001/     jbe)
...


Reproducibility
---------------
This is 100% reproducible when restarting pseudo in between trials or when using a previously not used directory name.

Note: I have a patch fixing this issue which I will submit to the mailing list.