The Univention modules have a issue with an unassigned variable.

[keachi]

SUMMARY

The variable diff is only assigned if state is 'present', else the
variable is unused. But the module will return the diff variable as a
return value. If the state isn't 'present' the module will fail with an
python UnboundLocalError exception.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

• udm_user
• udm_group
• udm_share
• udm_dns_zone
• udm_dns_record

ADDITIONAL INFORMATION

The full traceback is:
Traceback (most recent call last):
 File "/tmp/ansible_Id1UGE/ansible_module_udm_user.py", line 522, in <module>
   main()
 File "/tmp/ansible_Id1UGE/ansible_module_udm_user.py", line 517, in main
   diff=diff,
UnboundLocalError: local variable 'diff' referenced before assignment

fatal: [srv-ucs-01]: FAILED! => {
   "changed": false,  
   "module_stderr": "Traceback (most recent call last):\n  File \"/tmp/ansible_Id1UGE/ansible_module_udm_user.py\", line 522, in <module>\n    main()\n  File \"/tmp/ansible_Id1UGE/ansible_module_udm_user.py\",
line 517, in main\n    diff=diff,\nUnboundLocalError: local variable 'diff' referenced before assignment\n",                                                                                                      
   "module_stdout": "",  
   "msg": "MODULE FAILURE",  
   "rc": 1
}

[gundalow]

@keachi Thank you for fixing this

I've merged this PR into devel so it will be released in Ansible 2.8.

I see these modules exist in Ansible 2.7, so I wonder if a backport PR for the stable-2.7 branch should be created (including a changelog/fragment file)

https://docs.ansible.com/ansible/devel/community/development_process.html#making-your-pr-merge-worthy