ansible/changelogs/fragments/file-disallow-src.yaml

---
bugfixes:
- file module - The file module allowed the user to specify src as a parameter
  when state was not link or hard.  This is documented as only applying to
  state=link or state=hard but in previous Ansible, this could have an effect
  in rare cornercases.  For instance, "ansible -m file -a 'state=directory
  path=/tmp src=/var/lib'" would create /tmp/lib.  This has been disabled and
  a warning emitted (will change to an error in Ansible-2.10).