From 2fdb34ed2ea5fbe4d690332d4658cc34260c0edc Mon Sep 17 00:00:00 2001
From: Jiaming Yuan <jm.yuan@outlook.com>
Date: Mon, 16 Dec 2019 10:14:02 +0800
Subject: [PATCH] Fix metric name loading. (#5122)

---
 src/learner.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/learner.cc b/src/learner.cc
index f6f200774..45d3efff1 100644
--- a/src/learner.cc
+++ b/src/learner.cc
@@ -333,7 +333,7 @@ class LearnerImpl : public Learner {
     for (size_t i = 0; i < n_metrics; ++i) {
       metric_names_[i]= get<String>(j_metrics[i]);
       metrics_[i] = std::unique_ptr<Metric>(
-          Metric::Create(metric_names_.back(), &generic_parameters_));
+          Metric::Create(metric_names_[i], &generic_parameters_));
     }
 
     fromJson(learner_parameters.at("generic_param"), &generic_parameters_);
@@ -362,7 +362,7 @@ class LearnerImpl : public Learner {
     for (size_t i = 0; i < metrics_.size(); ++i) {
       metrics[i] = String(metrics_[i]->Name());
     }
-    learner_parameters["metrics"] = Array(metrics);
+    learner_parameters["metrics"] = Array(std::move(metrics));
 
     learner_parameters["generic_param"] = toJson(generic_parameters_);
   }