fix #318: return "NA" when no size can be displayed

diff --git a/src/instr/instr_private.hpp b/src/instr/instr_private.hpp
index 153996b..2f93556 100644 (file)
--- a/src/instr/instr_private.hpp
+++ b/src/instr/instr_private.hpp
@@ -105,7 +105,7 @@ class NoOpTIData : public TIData {
 public:
   explicit NoOpTIData(std::string name) : TIData(name){};
   std::string print() override { return getName(); }
 public:
   explicit NoOpTIData(std::string name) : TIData(name){};
   std::string print() override { return getName(); }

-  std::string display_size() override { return ""; }
+  std::string display_size() override { return "NA"; }

 };
 
 class CpuTIData : public TIData {
 };
 
 class CpuTIData : public TIData {