Merge branch 'master' of gitlab.com:ArmarX/RobotAPI

source/RobotAPI/libraries/widgets/JSONTreeModel.cpp

 #include "JSONTreeModel.h"
 
+#include <ArmarXCore/core/logging/Logging.h>
+
 namespace armarx
 {
 
@@ -58,6 +60,12 @@ namespace armarx
         }
 
         nlohmann::json* child = refFrom(index);
+        if (!parents.count(child))
+        {
+            //ARMARX_WARNING << "Map does not contain parent for child: " <<
+            //               (child ? child->dump(2) : "(null)");
+            return QModelIndex();
+        }
         nlohmann::json* parent = parents.at(child);
         if (parent == nullptr)
         {
@@ -107,6 +115,12 @@ namespace armarx
 
         if (index.column() == 0)
         {
+            if (!names.count(ref))
+            {
+                ARMARX_WARNING << "Map does not contain name for ref: " <<
+                               (ref ? ref->dump(2) : "(null)");
+                return QVariant();
+            }
             std::string const& name = names.at(ref);
             return QVariant(name.c_str());
         }