Remove stray field

include/yaml-cpp/node/node.h

@@ -129,7 +129,6 @@ class YAML_CPP_API Node {
   bool m_isValid;
   mutable detail::shared_memory_holder m_pMemory;
   mutable detail::node* m_pNode;
-  mutable const detail::node* m_pConstNode;
 };
 
 YAML_CPP_API bool operator==(const Node& lhs, const Node& rhs);

util/sandbox.cpp

@@ -26,11 +26,11 @@ class NullEventHandler : public YAML::EventHandler {
 };
 
 int main() {
-  const YAML::Node node;
+  YAML::Node root;
 
-  std::string key = "doesnotexist";
   for (;;) {
-    node[key];
+    YAML::Node node;
+    root = node;
   }
   return 0;
 }