why doesn't i work today

src/helper_funcs.cpp

@@ -31,4 +31,12 @@ void safe_exit(int code) {
   }
 
   exit(code);
+}
+
+std::string bool_to_string(bool bool_in) {
+  if (bool_in) {
+    return "true";
+  } else {
+    return "false";
+  }
 }