podman: podman save --format=oci-archive fails to write to a pipe

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

I wanted a quick and dirty way to copy an image from one computer to another. The manual for podman save says that it writes to stdout by default and the manual for podman load says that it reads from stdin by default so I assumed that piping the output of podman save to the destination via ssh would work, but podman save --format=oci-archive fails to write to a pipe.

Steps to reproduce the issue:

1. C="$(buildah from scratch)"

2. buildah commit "$C" bug

3. podman save --format=oci-archive bug | cat >/dev/null

Describe the results you received:

Error: error getting OCI archive ImageReference for (“/dev/stdout”, “localhost/bug”): lstat /proc/2102/fd/pipe:[34531]: no such file or directory

Describe the results you expected:

The image archive is written to stdout.

Additional information you deem important (e.g. issue happens only occasionally):

• This bug happens every time
• Without --format=oci-archive the command does not error

Output of podman version:

Version:      2.0.2
API Version:  1
Go Version:   go1.14.3
Built:        Thu Jan  1 03:00:00 1970
OS/Arch:      linux/amd64

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.15.0
  cgroupVersion: v2
  conmon:
    package: conmon-2.0.18-1.fc32.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.18, commit: 6e8799f576f11f902cd8a8d8b45b2b2caf636a85'
  cpus: 2
  distribution:
    distribution: fedora
    version: "32"
  eventLogger: file
  hostname: hostname
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 4.19.132-1.pvops.qubes.x86_64
  linkmode: dynamic
  memFree: 106500096
  memTotal: 479236096
  ociRuntime:
    name: crun
    package: crun-0.14.1-1.fc32.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.14.1
      commit: 598ea5e192ca12d4f6378217d3ab1415efeddefa
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +YAJL
  os: linux
  remoteSocket:
    path: /run/user/1000/podman/podman.sock
  rootless: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.1.4-1.fc32.x86_64
    version: |-
      slirp4netns version 1.1.4
      commit: b66ffa8e262507e37fca689822d23430f3357fe8
      libslirp: 4.3.1
      SLIRP_CONFIG_VERSION_MAX: 2
  swapFree: 997453824
  swapTotal: 1073737728
  uptime: 14m 16.04s
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - registry.centos.org
  - docker.io
store:
  configFile: /home/user/.config/containers/storage.conf
  containerStore:
    number: 4
    paused: 0
    running: 0
    stopped: 4
  graphDriverName: overlay
  graphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-1.1.2-1.fc32.x86_64
      Version: |-
        fusermount3 version: 3.9.1
        fuse-overlayfs: version 1.1.0
        FUSE library version 3.9.1
        using FUSE kernel interface version 7.31
  graphRoot: /home/user/.local/share/containers/storage
  graphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  imageStore:
    number: 5
  runRoot: /run/user/1000/containers
  volumePath: /home/user/.local/share/containers/storage/volumes
version:
  APIVersion: 1
  Built: 0
  BuiltTime: Thu Jan  1 03:00:00 1970
  GitCommit: ""
  GoVersion: go1.14.3
  OsArch: linux/amd64
  Version: 2.0.2

Package info (e.g. output of rpm -q podman or apt list podman):

podman-2.0.2-1.fc32.x86_64

Additional environment details (AWS, VirtualBox, physical, etc.): QubesOS https://github.com/QubesOS