From 3f3538e895a97759b5bb49f5de323aba733dd4ee Mon Sep 17 00:00:00 2001
From: Lourens Veen <l.veen@esciencecenter.nl>
Date: Fri, 2 Aug 2024 16:32:40 +0200
Subject: [PATCH] Fix compiling with GCC 14

---
 libmuscle/cpp/src/libmuscle/tests/test_instance.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libmuscle/cpp/src/libmuscle/tests/test_instance.cpp b/libmuscle/cpp/src/libmuscle/tests/test_instance.cpp
index 3471ffc4..7ff08ef0 100644
--- a/libmuscle/cpp/src/libmuscle/tests/test_instance.cpp
+++ b/libmuscle/cpp/src/libmuscle/tests/test_instance.cpp
@@ -200,7 +200,7 @@ struct libmuscle_instance_base : ::testing::Test, ConnectedPortManagerFixture {
                 std::vector<std::string>());
 
         MockSettingsManager::return_value.get_setting.side_effect = [](
-                Reference const &, Reference const &) -> SettingValue {
+                Reference const &, Reference const &) -> const SettingValue & {
             throw std::out_of_range("No settings set in mock, unset or replace side_effect");
         };
     }