ansible_port variable is not evaluated

[anxstj]

I pass a nested variable to Ansible to determine the connection port in a dynamic way. This has worked with Ansible-core 2.11 and mitogen and Ansible-core 2.13 without mitogen, but it doesn't work with Ansible-core 2.13 and mitogen.

• Which version of Ansible are you running?

ansible [core 2.13.7]
  config file = /home/user/.ansible.cfg
  configured module search path = ['/home/user/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/devenv-6/lib/python3.11/site-packages/ansible
  ansible collection location = /home/user/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/devenv-6/bin/ansible
  python version = 3.11.0 (main, Oct 24 2022, 00:00:00) [GCC 12.2.1 20220819 (Red Hat 12.2.1-2)]
  jinja version = 3.0.3
  libyaml = False

• Is your version of Ansible patched in any way?: No
• Are you running with any custom modules, or module_utils loaded? No
• Have you tried the latest master version from Git? Yes
• Mention your host and target OS and versions: Host: Fedora 37; Target: Debian 11
• Mention your host and target Python versions: see above

Playbook to reproduce the issue:

---
- hosts: all
  strategy: mitogen_linear

  vars:
    other_port: 22
    ansible_port: "{{ other_port }}"   # didn't work either: "{{ '22' }}"
  tasks:
    - debug: var=ansible_port

Command to reproduce the issue:

ansible-playbook -i myhost, playbook.yml

Actual output:

TASK [Gathering Facts] **********************************************************
[WARNING]: Unhandled error in Python interpreter discovery for host myhost: EOF on stream; last 100 lines received: Bad port '{{
other_port }}'
fatal: [myhost]: UNREACHABLE! => {"changed": false, "msg": "EOF on stream; last 100 lines received:\nBad port '{{ other_port }}'", "unreachable": true}

Expected output (as with strategy=linear):

TASK [Gathering Facts] *****************************************************************************
ok: [myhost]

TASK [debug] *************************************************************************************
ok: [myhost] => {
    "ansible_port": "22"
}

[sebhoss]

I can confirm that this is happening with Mitogen commit 88f15a8 (current master)

[mrmeyers99]

I can confirm I see the same issue. It works fine with 2.12.10 and mitogen 0.3.4 and 2.13.13 without mitogen, but not 2.13.13 and mitogen 0.3.4, despite the docs saying that 0.3.4 supports 2.13.