comment

Author: forsaken628

src/query/expression/src/aggregate/payload.rs

@@ -288,6 +288,7 @@ impl Payload {
             // write states
             let n = select_vector.len().min(new_group_rows);
             let (array_layout, padded_size) = layout.repeat(n).unwrap();
+            // Bump only allocates but does not drop, so there is no use after free for any item.
             let place = self.arena.alloc_layout(array_layout);
             for (idx, place) in select_vector
                 .iter()