"Do not commit the crime for which you now serve the sentence"
Why do you think the priest chose to warn Edmond of that in his dying moments?
I can understand him warning Edmond not to take revenge, or not to murder Mondego and Villefort, but warning him not to commit treason?
Why would he think Edmond would be a traitor to France (the crime Villefort had him jailed for)?
It just seems like an odd warning, considering he knew Edmond wanted revenge, not to betray France......