restrict type propagation literal to only if isinstance is being used
restrict type propagation literal to only if isinstance is being used

cpcloud/numba,IntelLabs/numba,cpcloud/numba,seibert/numba,numba/numba,numba/numba,numba/numba,cpcloud/numba,IntelLabs/numba,IntelLabs/numba,cpcloud/numba,cpcloud/numba,numba/numba,seibert/numba,IntelLabs/numba,IntelLabs/numba,seibert/numba,seibert/numba,numba/numba,seibert/numba