Plone 4 ZMI: Assigning principals to a role in portal_role_manager throws an exception

[batlock666]

Every time I try to add a principal to a role in portal_role_manager, I get the following exception:

Traceback (innermost last): Module ZPublisher.WSGIPublisher, line 142, in transaction_pubevents Module ZPublisher.WSGIPublisher, line 295, in publish_module Module ZPublisher.WSGIPublisher, line 229, in publish Module ZPublisher.mapply, line 85, in mapply Module ZPublisher.WSGIPublisher, line 57, in call_object Module Products.PluggableAuthService.utils, line 4, in wrapper Module , line 4, in manage_assignRoleToPrincipals Module AccessControl.requestmethod, line 85, in _curried Module Products.PluggableAuthService.plugins.ZODBRoleManager, line 421, in manage_assignRoleToPrincipals Module Products.PlonePAS.plugins.role, line 69, in assignRoleToPrincipal Module Products.PluggableAuthService.plugins.ZODBRoleManager, line 303, in assignRoleToPrincipal TypeError: '<' not supported between instances of 'str' and 'list'

Steps to reproduce:

1. Go to portal_role_manager.
2. Select a role.
3. Click "(Assign)".
4. Search for a principal.
5. Select the found principal.
6. Click the right arrow (->).
7. Exception!

Versions:

• Products.PluggableAuthService: 2.0b6
• Products.CMFPlone: 5.2rc3
• PlonePAS: 6.0.2

[batlock666]

After searching for the principal, I get this (check out the name of the role):

[dataflake]

Fixed by #44