- hosts: testhost
  gather_facts: no
  tasks: 
  - fail:
    ignore_errors: yes
    register: fail_out

  - debug:
      msg: fail works ({{ fail_out.failed }})

  - assert:
      that: false
    ignore_errors: yes
    register: assert_out

  - debug:
      msg: assert works ({{ assert_out.failed }}) 

  - fail:
      msg: fail actually failed