prevent deadlocks by setting the cache pointer to the source address in case of errors

offloading-cacher/cache.hpp

@@ -692,7 +692,7 @@ inline void dsacache::CacheData::WaitOnCompletion() {
     // handle errors now by aborting the cache
 
     if (error) {
-        cache_->store(nullptr);
+        cache_->store(src_);
         numa_free(incomplete_cache_, size_);
     }
     else {