Confused In Connecticut ...

[BillyMac]

Nevadaref posted this on another thread:

10.3.2 SITUATION B:
After a lengthy substitution process involving multiple
substitutions for both Team A and Team B, A5 goes to the bench and remains
there, mistakenly believing he/she has been replaced. The ball is put in play even
though Team A has only four players on the court. Team A is bringing the ball into
A’s frontcourt when the coach of Team A realizes they have only four players. The
coach yells for A5 to return and he/she sprints directly onto the court and catches
up with the play. RULING: No technical foul is charged to A5. A5’s return to
the court was not deceitful, nor did it provide A5 an unfair positioning advantage on the court.

In this caseplay, it appears that the coach recognized that there were only four players on the court before the official did. What happens if the official notices this "infraction" first? Rules and mechanics? And note that this situation does not occur after a timeout.