use variable with a default in a role

[fabix]

I have this role (roles/dummy/tasks/main.yml) :

---

- debug: var=dum_name

and this playbook (test.yml) :

---

- hosts: localhost

  vars:

    name: "{{ foo_name | default('boom') }}"

  tasks:

  - debug: var=name

  roles:

  - { role: dummy, dum_name: "{{ name }}" }

If I define a variable "foo_name=bar" in the inventory file for localhost , I get this output :

TASK: [dummy | debug var=dum_name] ******************************************** 

ok: [localhost] => {

    "var": {

        "dum_name": "boom"

    }

}

TASK: [debug var=name] ******************************************************** 

ok: [localhost] => {

    "var": {

        "name": "bar"

    }

}

In the dummy task, I expected : "dum_name": "bar" .

In a real application, I need to use several times a same role with different parameters. A simple way to get the same thing is :

...

  roles:

  - { role: dummy, dum_name: "{{ foo_name | default('boom') }}" }

but the problem is the same : I get "boom" in the result instead of "bar" .

What is the solution/workaround ?

Regards,

Fabien

[fabix]

Is it a bug or not ?