Comment # 3 on bug 1137059 from Jos� Guilherme Vanz

I just saw in the podman manual:

Rootless mode
       Podman can also be used as non-root user.  When podman runs in rootless
mode, a user namespace is automatically created for the user, defined in
/etc/subuid and /etc/subgid.

       Containers created by a non-root user are not visible to other users and
are not seen or managed by podman running as root.

       It is required to have multiple uids/gids set for an user.  Be sure the
user is present in the files /etc/subuid and /etc/subgid.

       If you have a recent version of usermod, you can execute the following
commands to add the ranges to the files

              $ sudo usermod --add-subuids 10000-75535 USERNAME
              $ sudo usermod --add-subgids 10000-75535 USERNAME

       Or just add the content manually.

              $ echo USERNAME:10000:65536 >> /etc/subuid
              $ echo USERNAME:10000:65536 >> /etc/subgid

       See the subuid(5) and subgid(5) man pages for more information.

       Images are pulled under XDG_DATA_HOME when specified, otherwise in the
home directory of the user under .local/share/containers/storage.

       Currently the slirp4netns package is required to be installed to create
a network device, otherwise rootless containers need to run in the network
namespace of the host.

@tbechtold, ignore my question from comment 2. The answer is in the bug title.
I think the manual documentation resolve the bug, don't you think?