Did Alonso make a settings mistake to cause his engine to quit?

[Alianora La Canta]

My Subaru has a device that prevents you from shifting into 1ST above 30 mph. Shouldn't these cars have something that prevents engaging fuel cut off or pit lane mode at high speed?

I wonder if the Powers-That-Be at the FIA would declare anything like that to be an "illegal driver's aid."

It does. Only two cut-offs are permitted (and are in fact mandated for safety reasons) - a total engine cut if a contradictory torque command is given (for example, if both pedals are fully engaged simultaneously) and a similar total engine cut if one of the emergency cut-off buttons are pressed. Pit lane mode must always be activateable, partly for safety reasons and partly so there can be no excuses for drivers exceeding the pitlane speed limit.

On the other hand, engines can and generally do have something that forbids jumping a gear (for example, from 6th to 4th) if doing so will exceed the rev limits - be that too high in the case of going down or too low in the case of going up. No such item is permitted for sequential shifts.