as11: change invalid prop warnings into exceptions
as11: change invalid prop warnings into exceptions

xunchangguo/BMX,ebu/ebu-bmx,xunchangguo/BMX,stuarthicks/bmx,stuarthicks/bmx,kierank/bmxlib-bmx,kierank/bmxlib-bmx,Limecraft/ebu-bmx,Limecraft/ebu-bmx,ebu/ebu-bmx,kierank/bmxlib-bmx,ebu/ebu-bmx,Limecraft/ebu-bmx,xunchangguo/BMX,stuarthicks/bmx