Would you please enlighten us all, as to what "indications" do you think the AF447 pilots had (apart from the stall warning) when AP failed?
Buffet, as indicated in the BEA report?
Pitch-up, as probably indicated on the attitude display?
Sudden increase in altitude, despite the flying pilot mentioning to both the captain and the second co-pilot that the REC MAX was only FL375?
There may be others.