fixed bug in hit buffer

Author: bbuchfink

src/search/hit_buffer.h

@@ -189,12 +189,13 @@ struct HitBuffer
 		if (config.trace_pt_membuf || config.swipe_all) {
 			if (bins_processed_ >= bins())
 				return std::tuple<Hit*, size_t, Key, Key> { nullptr, 0, 0, 0 };
-			auto& buf = hit_buf_[bins_processed_];
 			++bins_processed_;
 			if(config.swipe_all)
 				return std::tuple<Hit*, size_t, Key, Key> { nullptr, 0, input_range_next_.first, input_range_next_.second };
-			else
+			else {
+				auto& buf = hit_buf_[bins_processed_];
 				return std::tuple<Hit*, size_t, Key, Key> { buf.data(), buf.size(), input_range_next_.first, input_range_next_.second };
+			}
 		}
 		else {
 			if (load_worker_) {