1.) Description of problem:

while deleting LDAP synchronized groups in openshift with the command:
#oc adm prune groups --sync-config=sync.yaml

gives an error as follows:
~~~
panic: runtime error: slice bounds out of range

~~~

2.) Version-Release number of selected component (if applicable): 3.11.z


3.) How reproducible:
No steps to reproduce


4.)Actual results:
gives the error panic: runtime error: slice bounds out of range
and groups not deleted

5.) Expected results:
groups are deleted. 

6.) Additional info:
Similar error found while running oc client queries in ocp 4.1.z 
https://bugzilla.redhat.com/show_bug.cgi?id=1716550