According to rule 16.1 Red was not allowed to luff so late that Blue had no room to keep clear. If Red had luffed earlier, Blue would have been obliged to keep clear by tacking or bearing away. In this case Red bears away and therefore she is not infringing a rule and no boat shall be penalized. There is no rule, that requires of a boat (here: Blue) to anticipate an action of another boat (here: Red's luff to head for the start line), even if this action is to be expected.