beam_validator: Raise an error on invalid register use
beam_validator: Raise an error on invalid register use

This is a pinch better than crashing outright.

getong/otp,jj1bdx/otp,rlipscombe/otp,electricimp/otp,ferd/otp,uabboli/otp,ferd/otp,rlipscombe/otp,mikpe/otp,dumbbell/otp,rlipscombe/otp,vladdu/otp,dumbbell/otp,mikpe/otp,kvakvs/otp,g-andrade/otp,potatosalad/otp,ferd/otp,g-andrade/otp,bjorng/otp,uabboli/otp,kvakvs/otp,emacsmirror/erlang,lrascao/otp,dgud/otp,erlang/otp,vinoski/otp,bjorng/otp,dgud/otp,vinoski/otp,uabboli/otp,electricimp/otp,isvilen/otp,dumbbell/otp,lrascao/otp,dgud/otp,vinoski/otp,jj1bdx/otp,dumbbell/otp,mikpe/otp,electricimp/otp,getong/otp,emacsmirror/erlang,potatosalad/otp,potatosalad/otp,mikpe/otp,uabboli/otp,erlang/otp,dumbbell/otp,potatosalad/otp,getong/otp,bjorng/otp,isvilen/otp,g-andrade/otp,getong/otp,jj1bdx/otp,getong/otp,uabboli/otp,dgud/otp,vladdu/otp,erlang/otp,jj1bdx/otp,uabboli/otp,emacsmirror/erlang,lrascao/otp,vinoski/otp,lrascao/otp,dumbbell/otp,vladdu/otp,dumbbell/otp,erlang/otp,kvakvs/otp,electricimp/otp,ferd/otp,vladdu/otp,kvakvs/otp,jj1bdx/otp,lrascao/otp,uabboli/otp,rlipscombe/otp,erlang/otp,lrascao/otp,jj1bdx/otp,erlang/otp,rlipscombe/otp,kvakvs/otp,uabboli/otp,getong/otp,vinoski/otp,erlang/otp,emacsmirror/erlang,g-andrade/otp,rlipscombe/otp,vinoski/otp,potatosalad/otp,bjorng/otp,kvakvs/otp,uabboli/otp,jj1bdx/otp,mikpe/otp,isvilen/otp,dgud/otp,ferd/otp,getong/otp,kvakvs/otp,dgud/otp,jj1bdx/otp,mikpe/otp,lrascao/otp,dgud/otp,erlang/otp,rlipscombe/otp,potatosalad/otp,electricimp/otp,isvilen/otp,mikpe/otp,emacsmirror/erlang,vinoski/otp,g-andrade/otp,lrascao/otp,vladdu/otp,kvakvs/otp,isvilen/otp,ferd/otp,erlang/otp,g-andrade/otp,electricimp/otp,g-andrade/otp,dgud/otp,potatosalad/otp,emacsmirror/erlang,potatosalad/otp,ferd/otp,rlipscombe/otp,ferd/otp,g-andrade/otp,bjorng/otp,mikpe/otp,erlang/otp,getong/otp,dumbbell/otp,potatosalad/otp,dumbbell/otp,mikpe/otp,vladdu/otp,ferd/otp,emacsmirror/erlang,getong/otp,isvilen/otp,isvilen/otp,dumbbell/otp,jj1bdx/otp,vinoski/otp,emacsmirror/erlang,g-andrade/otp,bjorng/otp,kvakvs/otp,jj1bdx/otp,potatosalad/otp,bjorng/otp,g-andrade/otp,vladdu/otp,emacsmirror/erlang,electricimp/otp,lrascao/otp,electricimp/otp,vladdu/otp,vinoski/otp,isvilen/otp,electricimp/otp,dgud/otp,bjorng/otp,vinoski/otp,vladdu/otp,rlipscombe/otp,dgud/otp,getong/otp,emacsmirror/erlang,bjorng/otp,bjorng/otp,mikpe/otp,isvilen/otp,isvilen/otp,rlipscombe/otp