From a76246f5a3aeb3e735a40d1b90575630fb7bb564 Mon Sep 17 00:00:00 2001
From: Anthony Geay <anthony.geay@edf.fr>
Date: Mon, 2 Aug 2021 11:59:37 +0200
Subject: [PATCH] [EDF23738] : bug correction to avoid regressions

---
 src/MEDLoader/MEDFileField.cxx | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/MEDLoader/MEDFileField.cxx b/src/MEDLoader/MEDFileField.cxx
index 17b42cf44..df12e7be8 100644
--- a/src/MEDLoader/MEDFileField.cxx
+++ b/src/MEDLoader/MEDFileField.cxx
@@ -1092,7 +1092,12 @@ void MEDFileFields::aggregateFieldsOnSameMeshes(MEDFileMeshes *ms)
 {
   if(!ms)
     THROW_IK_EXCEPTION("MEDFileFields::aggregateFieldsOnSameMeshes : ms is nullptr !");
-  MCAuto<MEDFileFields> mfs(MEDFileFields::New());
+  //
+  std::vector<std::string> msNames(ms->getMeshesNames());
+  std::set<std::string> msNamesSet(msNames.begin(),msNames.end());
+  if(msNames.size() == msNamesSet.size())
+    return ;
+  //
   std::map<std::string,std::vector< MCAuto<MEDFileAnyTypeFieldMultiTSWithoutSDA>> > fsByName;
   for(auto fmts : _fields)
   {
@@ -1186,7 +1191,7 @@ void MEDFileFields::aggregateFieldsOnSameMeshes(MEDFileMeshes *ms)
     gg->setCoords(coo);
     otherMeshes.push_back(DynamicCast<MEDFileUMesh,MEDFileMesh>(gg));
   }
-  //
+  // until this point nothing has changed in \a this nor in \a ms as if a const method.
   ms->resize(0);
   for(auto mesh : otherMeshes)
     ms->pushMesh(mesh);
-- 
2.39.2