From e36aeda0e759c5328ba76412dde8afbecf34970b Mon Sep 17 00:00:00 2001
From: Mathias Preiner <mathias.preiner@gmail.com>
Date: Wed, 24 Feb 2021 16:26:44 -0800
Subject: Enable -Werror. (#5969)

---
 src/expr/node_trie.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/expr')

diff --git a/src/expr/node_trie.cpp b/src/expr/node_trie.cpp
index 58ad36da9..d2da99509 100644
--- a/src/expr/node_trie.cpp
+++ b/src/expr/node_trie.cpp
@@ -24,7 +24,7 @@ NodeTemplate<ref_count> NodeTemplateTrie<ref_count>::existsTerm(
   const NodeTemplateTrie<ref_count>* tnt = this;
   typename std::map<NodeTemplate<ref_count>,
                     NodeTemplateTrie<ref_count>>::const_iterator it;
-  for (const NodeTemplate<ref_count> r : reps)
+  for (const NodeTemplate<ref_count>& r : reps)
   {
     it = tnt->d_data.find(r);
     if (it == tnt->d_data.end())
@@ -51,7 +51,7 @@ NodeTemplate<ref_count> NodeTemplateTrie<ref_count>::addOrGetTerm(
     NodeTemplate<ref_count> n, const std::vector<NodeTemplate<ref_count>>& reps)
 {
   NodeTemplateTrie<ref_count>* tnt = this;
-  for (const NodeTemplate<ref_count> r : reps)
+  for (const NodeTemplate<ref_count>& r : reps)
   {
     tnt = &(tnt->d_data[r]);
   }
-- 
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