Raise more sensible error on non-existent globals
Raise more sensible error on non-existent globals

cpcloud/numba,pombredanne/numba,numba/numba,jriehl/numba,pitrou/numba,ssarangi/numba,ssarangi/numba,pitrou/numba,gmarkall/numba,IntelLabs/numba,pombredanne/numba,jriehl/numba,gmarkall/numba,sklam/numba,gmarkall/numba,seibert/numba,gdementen/numba,sklam/numba,stefanseefeld/numba,seibert/numba,sklam/numba,GaZ3ll3/numba,stuartarchibald/numba,stefanseefeld/numba,stonebig/numba,stuartarchibald/numba,stuartarchibald/numba,IntelLabs/numba,ssarangi/numba,ssarangi/numba,stefanseefeld/numba,cpcloud/numba,gmarkall/numba,numba/numba,stonebig/numba,pitrou/numba,jriehl/numba,numba/numba,stonebig/numba,seibert/numba,stefanseefeld/numba,gdementen/numba,gdementen/numba,cpcloud/numba,pombredanne/numba,IntelLabs/numba,sklam/numba,seibert/numba,shiquanwang/numba,pombredanne/numba,stuartarchibald/numba,pombredanne/numba,cpcloud/numba,GaZ3ll3/numba,IntelLabs/numba,ssarangi/numba,gdementen/numba,pitrou/numba,jriehl/numba,gmarkall/numba,cpcloud/numba,GaZ3ll3/numba,stonebig/numba,pitrou/numba,stuartarchibald/numba,numba/numba,gdementen/numba,stonebig/numba,numba/numba,jriehl/numba,GaZ3ll3/numba,sklam/numba,IntelLabs/numba,stefanseefeld/numba,shiquanwang/numba,seibert/numba,shiquanwang/numba,GaZ3ll3/numba