As designed No error when "Target user" empty

[Romchik®]

No error when merging the user with "nothing".



Nothing happens after pressing the button

 

[Romchik®]

BTW, same for "Delete Conversation" and "Revert Message Edits". No feedback after pressing the buttons.
Something has been deleted/reverted or not?
If it was removed/reverted, how much?

 

[Mike]

One report per bug please.

The behavior when you don't enter a name is intentional.