Ansible 2.2.0.0: Variables in handler names not populated

[command-tab]

Issue Type: Bug Report, Regression from #15713

Component Name: handlers

Ansible Version: 2.2.0.0

Environment: OS X 10.11.6

Summary: Under Ansible 2.2.0.0, Jinja variables contained in a handler name are no longer populated. Under Ansible 1.9.x and 2.1.1.0, they were populated. Here's a quick example:

Steps To Reproduce:

1. Write this content to playbook.yml:

   ---
   - hosts: localhost
     connection: local
     vars:
       appname: someapp
     handlers:
     # The following line, when the handler is executed, does not populate {{ appname }}
     - name: restart {{ appname }}
       debug:
         msg: some bogus module call in handler {{ appname }}
     tasks:
     - name: bogus task with notify for {{ appname }}
       command: ls
       notify: restart {{ appname }}

2. Run the playbook: ansible-playbook --connection=local playbook.yml

Expected Results: In the output of the playbook run, any mention of {{ appname }} should not appear, but replaced with someapp, per the given variables.

Actual Results:

  [WARNING]: Host file not found: /usr/local/etc/ansible/hosts

 [WARNING]: provided hosts list is empty, only localhost is available


PLAY [localhost] ***************************************************************

TASK [setup] *******************************************************************
ok: [localhost]

TASK [bogus task with notify for someapp] **************************************
changed: [localhost]

RUNNING HANDLER [restart {{ appname }}] ****************************************
ok: [localhost] => {
    "msg": "some bogus module call in handler someapp"
}

PLAY RECAP *********************************************************************
localhost                  : ok=3    changed=1    unreachable=0    failed=0   

Note that in the RUNNING HANDLER line, the Jinja template syntax is printed literally, rather than being populated with the variable that clearly exists, since it's populated elsewhere. This is a regression from 1.9.x and 2.1.1.0.

[lucafavatella]

I understand this is a duplicate of #17922

[command-tab]

@ansibot Nope, it's right there in my original issue description: "Component Name: handlers"