potential fix for lifetime of cache data

qdp_project/src/benchmark/pipelines/MAX_scan_filter_pipe.h

@@ -313,12 +313,14 @@ public:
             // calculate pointers
             size_t chunk_id = gid + gcnt * i;
             base_t* chunk_ptr = get_sub_chunk_ptr(data_b, chunk_id, chunk_size_w, tid, tcnt);
+
+            std::unique_ptr<dsacache::CacheData> data;
             base_t* data_ptr;
 
             if constexpr (caching) {
                 // access the cache for the given chunk which will have been accessed in scan_b
 
-                const auto data = cache_.Access(reinterpret_cast<uint8_t *>(chunk_ptr), chunk_size_b / tcnt);
+                data = cache_.Access(reinterpret_cast<uint8_t *>(chunk_ptr), chunk_size_b / tcnt);
 
                 // wait on the caching task to complete, this will give time for other processes
                 // to make progress here which will therefore not hurt performance