When the last group in require membership of list is invalid, require_membership_of_sid ends with ','.. it is malformed parameter in this case.
Created attachment 5289 [details]
patch for v3-3-test
Created attachment 5290 [details]
patch for v3-4-test
Created attachment 5291 [details]
patch for v3-5-test
Can you please include these backports?
Pushed to all branches.
Closing out bug report.