From a33d25a6bf6e50f0965d8dae5660ac293a3535f5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A5kon=20H=C3=A6gland?= <hakon.hagland@gmail.com>
Date: Mon, 12 Aug 2024 15:06:21 +0200
Subject: [PATCH] Use const auto reference

---
 opm/input/eclipse/Schedule/ResCoup/MasterGroup.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/opm/input/eclipse/Schedule/ResCoup/MasterGroup.cpp b/opm/input/eclipse/Schedule/ResCoup/MasterGroup.cpp
index 0b4f9898177..896621327f7 100644
--- a/opm/input/eclipse/Schedule/ResCoup/MasterGroup.cpp
+++ b/opm/input/eclipse/Schedule/ResCoup/MasterGroup.cpp
@@ -51,7 +51,7 @@ bool MasterGroup::operator==(const MasterGroup& rhs) const {
 
 void checkValidGroupName(const std::string& name, HandlerContext& handlerContext)
 {
-    auto groups = handlerContext.state().groups;
+    const auto& groups = handlerContext.state().groups;
     if (!groups.has(name)) {
         std::string msg = fmt::format("Group '{}': Not defined. Master groups should be defined in advance by using GRUPTREE before referenced in GRUPMAST.", name);
         throw OpmInputError(msg, handlerContext.keyword.location());