Ansible error after upgrade to 2.2.x: how to fix.

The playbook throws an error:

TASK [create a users emails with hostname] ******************************
fatal: [hostname]: FAILED! => {"failed": true, "msg": "the field 'args' has an invalid value, which appears to include a variable that is undefined. The error was: 'ansible.vars.unsafe_proxy.AnsibleUnsafeText object' has no attribute 'username'\n\nThe error appears to have been in 'deploy_aliases.yml': line 21, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n  - name: create a users emails with host\n    ^ here\n"}

before:

  - name: create a users emails with host
    lineinfile:
       dest: aliases-nmail
       state: present
       regexp: '^{{item.username}}:'
       line: '{{item.username}}:                  {{item.email}}@host'
    with_items: users

Should be now:

  - name: create a users emails with host
    lineinfile:
       dest: aliases-nmail
       state: present
       regexp: '^{{item.username}}:'
       line: '{{item.username}}:                  {{item.email}}@host'
    with_items: "{{users}}"