From 4a3df704b6821ff889fdce81f41650563fb3604c Mon Sep 17 00:00:00 2001
From: Teon Banek <teon.banek@memgraph.io>
Date: Wed, 24 Apr 2019 16:22:29 +0200
Subject: [PATCH] Fix iterator invalidation when appending to vector

Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D1979
---
 tests/unit/bfs_common.hpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tests/unit/bfs_common.hpp b/tests/unit/bfs_common.hpp
index b50ea55db..872a2defc 100644
--- a/tests/unit/bfs_common.hpp
+++ b/tests/unit/bfs_common.hpp
@@ -63,9 +63,10 @@ std::vector<std::pair<int, int>> GetEdgeList(
       for (auto &e : ret) std::swap(e.first, e.second);
       break;
     case query::EdgeAtom::Direction::BOTH:
-      std::transform(
-          ret.begin(), ret.end(), std::back_inserter(ret),
-          [](const auto &e) { return std::make_pair(e.second, e.first); });
+      auto ret_copy = ret;
+      for (const auto &e : ret_copy) {
+        ret.emplace_back(e.second, e.first);
+      }
       break;
   }
   return ret;