Fix invalid warning on first-class function feature
Fix invalid warning on first-class function feature

numba/numba,IntelLabs/numba,stuartarchibald/numba,gmarkall/numba,IntelLabs/numba,stuartarchibald/numba,seibert/numba,sklam/numba,gmarkall/numba,stonebig/numba,cpcloud/numba,IntelLabs/numba,sklam/numba,numba/numba,seibert/numba,numba/numba,stonebig/numba,seibert/numba,stuartarchibald/numba,sklam/numba,seibert/numba,cpcloud/numba,sklam/numba,sklam/numba,gmarkall/numba,gmarkall/numba,stuartarchibald/numba,IntelLabs/numba,stonebig/numba,cpcloud/numba,stonebig/numba,numba/numba,numba/numba,stonebig/numba,seibert/numba,IntelLabs/numba,gmarkall/numba,cpcloud/numba,cpcloud/numba,stuartarchibald/numba