dnsdist: Fix a clang-tidy warning

diff --git a/pdns/dnsdist-lua-actions.cc b/pdns/dnsdist-lua-actions.cc
index eb34ca125cea5f2b5ec737c7d411fbec5cda5fee..4da9dd92a635b9e4f4ebfbb378a6418c92997b82 100644 (file)
--- a/pdns/dnsdist-lua-actions.cc
+++ b/pdns/dnsdist-lua-actions.cc
@@ -520,7 +520,7 @@ public:
   {
     return Action::Truncate;
   }
-  std::string toString() const override
+  [[nodiscard]] std::string toString() const override
   {
     return "tc=1 answer";
   }