auth: Fix 'loop variable [...] creates a copy' warnings

[thirdparty/pdns.git] / pdns / slavecommunicator.cc

diff --git a/pdns/slavecommunicator.cc b/pdns/slavecommunicator.cc
index 0638c51e1c5f319cb2f06d5e5f1360a4098a726e..4b0ade2113344aee19d851613a3da1f5a31b307a 100644 (file)
--- a/pdns/slavecommunicator.cc
+++ b/pdns/slavecommunicator.cc
@@ -135,7 +135,7 @@ void CommunicatorClass::ixfrSuck(const DNSName &domain, const TSIGTriplet& tt, c
         grouped[{x.d_name, x.d_type}].second.push_back(x);
 
       di.backend->startTransaction(domain, -1);
-      for(const auto g : grouped) {
+      for(const auto& g : grouped) {
         vector<DNSRecord> rrset;
         {
           DNSZoneRecord zrr;