ansible/test/integration/targets/blocks/72725.yml

- hosts: host1,host2
  gather_facts: no
  tasks:
    - block:
        - block:
          - name: EXPECTED FAILURE host1 fails
            fail:
            when: inventory_hostname == 'host1'

          - set_fact:
               only_host2_fact: yes

        - name: should not fail
          fail:
          when: only_host2_fact is not defined
      always:
        - block:
          - meta: clear_host_errors

    - assert:
        that:
          - only_host2_fact is defined
      when:
        - inventory_hostname == 'host2'