diff --git a/operator-digest.go b/operator-digest.go
index 64a8230..8772021 100644
--- a/operator-digest.go
+++ b/operator-digest.go
@@ -48,9 +48,10 @@ func evalDigest(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
 		ctx.SetVar("#", it.Count())
 		if rightValue, err = opTerm.Children[1].Compute(ctx); err == nil {
 			if rightValue == nil {
-				break
+				err = io.EOF
 			} else {
 				lastValue = rightValue
+				ctx.SetVar(kern.ControlLastResult, lastValue)
 			}
 		}
 		ctx.DeleteVar("#")