From b0fe1aaa172f960a0460f2fde9a357b08d98eff7 Mon Sep 17 00:00:00 2001
From: Suguru Kato <salmon.bioinformatics@gmail.com>
Date: Thu, 23 Jan 2020 14:00:26 +0900
Subject: [PATCH] :bug: Fix SpatiocyteWorld::check_neighbor()

---
 ecell4/spatiocyte/SpatiocyteWorld.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/ecell4/spatiocyte/SpatiocyteWorld.cpp b/ecell4/spatiocyte/SpatiocyteWorld.cpp
index c62f2dbaf..e286be8f7 100644
--- a/ecell4/spatiocyte/SpatiocyteWorld.cpp
+++ b/ecell4/spatiocyte/SpatiocyteWorld.cpp
@@ -355,8 +355,7 @@ boost::optional<Voxel> SpatiocyteWorld::check_neighbor(const Voxel &voxel,
     {
         const Voxel neighbor(get_neighbor(voxel, rnd));
         boost::shared_ptr<const VoxelPool> mt(neighbor.get_voxel_pool());
-        const std::string serial(mt->is_vacant() ? "" : mt->species().serial());
-        if (serial == loc)
+        if (mt->species().serial() == loc)
         {
             tmp.push_back(neighbor);
         }