Fix null pointer dereference.

[simgrid.git] / src / s4u / s4u_Netzone.cpp

diff --git a/src/s4u/s4u_Netzone.cpp b/src/s4u/s4u_Netzone.cpp
index ddb8816..f31917b 100644 (file)
--- a/src/s4u/s4u_Netzone.cpp
+++ b/src/s4u/s4u_Netzone.cpp
@@ -33,11 +33,11 @@ std::unordered_map<std::string, std::string>* NetZone::get_properties()
 }
 
 /** Retrieve the property value (or nullptr if not set) */
-const char* NetZone::get_property(std::string key)
+const char* NetZone::get_property(const std::string& key)
 {
   return properties_.at(key).c_str();
 }
-void NetZone::set_property(std::string key, std::string value)
+void NetZone::set_property(const std::string& key, std::string value)
 {
   simgrid::simix::simcall([this, key, value] { properties_[key] = std::move(value); });
 }