fix memory leak.
diff --git a/cpp/test/reader/bloom_filter_test.cc b/cpp/test/reader/bloom_filter_test.cc
index 5e8bbff..d947bf5 100644
--- a/cpp/test/reader/bloom_filter_test.cc
+++ b/cpp/test/reader/bloom_filter_test.cc
@@ -62,4 +62,6 @@
         ASSERT_TRUE(my_set.find(static_cast<int>(filter_data_bytes2[i])) !=
                     my_set.end());
     }
+    common::mem_free(filter_data_bytes);
+    common::mem_free(filter_data_bytes2);
 }