fix CellMeta reduce

1 files changed, 1 insertions, 2 deletions

diff --git a/eval/src/vespa/eval/eval/cell_type.h b/eval/src/vespa/eval/eval/cell_type.h
index 581064677cf..4eec639478d 100644
--- a/eval/src/vespa/eval/eval/cell_type.h
+++ b/eval/src/vespa/eval/eval/cell_type.h
@@ -124,8 +124,7 @@ struct CellMeta {
     static constexpr CellMeta reduce(CellType input_cell_type, bool output_is_scalar) {
         return normalize(input_cell_type, output_is_scalar).decay();
     }
-    constexpr CellMeta reduce(bool output_is_scalar) {
-        assert(!is_scalar);
+    constexpr CellMeta reduce(bool output_is_scalar) const {
         return CellMeta::reduce(cell_type, output_is_scalar);
     }
     static constexpr CellMeta join(CellMeta a, CellMeta b) { return unify(a, b).decay(); }