From c817f21bad61c366a3798abccfe3b62e6eb9209d Mon Sep 17 00:00:00 2001
From: searchivarius <leo@boytsov.info>
Date: Wed, 19 Jun 2019 05:13:47 -0400
Subject: [PATCH] Memory leak fix #398

---
 python_bindings/nmslib.cc | 13 +++++++------
 python_bindings/setup.py  |  2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/python_bindings/nmslib.cc b/python_bindings/nmslib.cc
index add5588..527e5a6 100644
--- a/python_bindings/nmslib.cc
+++ b/python_bindings/nmslib.cc
@@ -60,7 +60,7 @@ template <typename dist_t> void exportIndex(py::module * m);
 template <typename dist_t> std::string distName();
 AnyParams loadParams(py::object o);
 void exportLegacyAPI(py::module * m);
-void freeObjectVector(ObjectVector * data);
+void freeAndClearObjectVector(ObjectVector& data);
 
 // Wrap a space/objectvector/index together for ease of use
 template <typename dist_t>
@@ -101,7 +101,7 @@ struct IndexWrapper {
     index.reset(factory.CreateMethod(print_progress, method, space_type, *space, data));
     if (load_data) {
       vector<string> dummy;
-      data.clear();
+      freeAndClearObjectVector(data);
       space->ReadObjectVectorFromBinData(data, dummy, filename + data_suff);
     }
     index->LoadIndex(filename);
@@ -156,7 +156,7 @@ struct IndexWrapper {
       });
 
       // TODO(@benfred): some sort of RAII auto-destroy for this
-      freeObjectVector(&queries);
+      freeAndClearObjectVector(queries);
     }
 
     py::list ret;
@@ -362,7 +362,7 @@ struct IndexWrapper {
     // In cases when the interpreter was shutting down, attempting to log in python
     // could throw an exception (https://github.com/nmslib/nmslib/issues/327).
     //LOG(LIB_DEBUG) << "Destroying Index";
-    freeObjectVector(&data);
+    freeAndClearObjectVector(data);
   }
 
   std::string method;
@@ -657,10 +657,11 @@ template <> std::string distName<int>() { return "Int"; }
 template <> std::string distName<float>() { return "Float"; }
 template <> std::string distName<double>() { return "Double"; }
 
-void freeObjectVector(ObjectVector * data) {
-  for (auto datum : *data) {
+void freeAndClearObjectVector(ObjectVector& data) {
+  for (auto datum : data) {
     delete datum;
   }
+  data.clear();
 }
 
 AnyParams loadParams(py::object o) {
diff --git a/python_bindings/setup.py b/python_bindings/setup.py
index 4a0c9e8..cc81075 100755
--- a/python_bindings/setup.py
+++ b/python_bindings/setup.py
@@ -4,7 +4,7 @@
 import sys
 import setuptools
 
-__version__ = '1.8'
+__version__ = '1.8.1'
 
 libdir = os.path.join(".", "nmslib", "similarity_search")
 if not os.path.isdir(libdir) and sys.platform.startswith("win"):