I have a list of comments that are flagged. I have added the Flag (or unflag) comment action to my comment listing. When select this action and click "Execute" My comment does not get flagged (or unflagged) and instead I see the PHP warning:

Notice: Undefined index: flag in flag_comment_action() (line 134 of backdrop/modules/contrib/flag/includes/flag.actions.inc). 

The notice is correct, as there is no $context['flag_action']. There is however, $context['action_info'] but it does not seem to contain the values we need here.

PR: #22