podman: podman failing to honor PATH variable setting in image

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

/kind bug

Description

The elastic/filebeat:7.6.1 image sets the PATH environment variable. When running under Docker this works correct, but when running under Podman, the environment variable is not set as expected.

Steps to reproduce the issue:

1. echo 'echo $PATH' | podman run --rm -i --entrypoint bash elastic/filebeat:7.6.1

Describe the results you received:

The above test, with Podman, returns:

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

Describe the results you expected:

The same command, with Docker, includes the correct output:

$ echo 'echo $PATH' | docker run --rm -i --entrypoint bash elastic/filebeat:7.6.1 
/usr/share/filebeat:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

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

Output of podman version:

Version:            1.8.3-dev
RemoteAPI Version:  1
Go Version:         go1.13.6
Git Commit:         c2f37afabbdeb7bb062f7c5211601c10f5e3f99f-dirty
Built:              Fri Aug  3 20:00:00 2018
OS/Arch:            linux/amd64

Output of podman info --debug:

debug:
  compiler: gc
  git commit: c2f37afabbdeb7bb062f7c5211601c10f5e3f99f-dirty
  go version: go1.13.6
  podman version: 1.8.3-dev
host:
  BuildahVersion: 1.14.5
  CgroupVersion: v2
  Conmon:
    package: podman-1.8.3-1585660943.git9c7410d3.fc31.x86_64
    path: /usr/libexec/podman/conmon
    version: 'conmon version 2.0.7, commit: c2f37afabbdeb7bb062f7c5211601c10f5e3f99f-dirty'
  Distribution:
    distribution: fedora
    version: "31"
  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
  MemFree: 806383616
  MemTotal: 33574580224
  OCIRuntime:
    name: crun
    package: crun-0.13-1.fc31.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.13
      commit: e79e4de4ac16da0ce48777afb72c6241de870525
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +YAJL
  SwapFree: 16840126464
  SwapTotal: 16890458112
  arch: amd64
  cpus: 8
  eventlogger: journald
  hostname: madhatter
  kernel: 5.5.11-200.fc31.x86_64
  os: linux
  rootless: true
  slirp4netns:
    Executable: /usr/bin/slirp4netns
    Package: slirp4netns-0.4.0-20.1.dev.gitbbd6f25.fc31.x86_64
    Version: |-
      slirp4netns version 0.4.0-beta.3+dev
      commit: bbd6f25c70d5db2a1cd3bfb0416a8db99a75ed7e
  uptime: 12h 42m 31.9s (Approximately 0.50 days)
registries:
  search:
  - docker.io
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - registry.centos.org
  - quay.io
store:
  ConfigFile: /home/lars/.config/containers/storage.conf
  ContainerStore:
    number: 12
  GraphDriverName: overlay
  GraphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-0.7.8-1.fc31.x86_64
      Version: |-
        fusermount3 version: 3.6.2
        fuse-overlayfs: version 0.7.8
        FUSE library version 3.6.2
        using FUSE kernel interface version 7.29
  GraphRoot: /home/lars/.local/share/containers/storage
  GraphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  ImageStore:
    number: 39
  RunRoot: /run/user/1000
  VolumePath: /home/lars/.local/share/containers/storage/volumes

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

podman-1.8.3-1585660943.git9c7410d3.fc31.x86_64