TypeError when submitting a flag with custom content (require_message flags)

[Moin]

@cuo_wu

For require_message: true flags (which are all notify_type: true), post_can_act? sets can_act: false when already_did_flagging is true — i.e. the user has previously submitted any notify-type flag on that post. In that case the entry is absent from actions_summary, postActionFor returns undefined, and the crash follows.

I think flagging the topic once won’t cause this because then already_did_flagging should be false. Usually flagging the same post again is not possible. But after flagging as “something else” you can still flag as “illegal”. The result in this case is