X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/1fc042e8bc9c51f9267fa1936deaebe59ae01ee7..6af348b861fc72e45173e89c5f9540cefb6ee252:/src/mc/Session.cpp

diff --git a/src/mc/Session.cpp b/src/mc/Session.cpp
index b88f98dd72..a01cf122ce 100644
--- a/src/mc/Session.cpp
+++ b/src/mc/Session.cpp
@@ -23,6 +23,7 @@
 #include "src/smpi/include/private.hpp"
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_Session, mc, "Model-checker session");
+extern std::string _sg_mc_dot_output_file;
 
 namespace simgrid {
 namespace mc {
@@ -122,7 +123,7 @@ void Session::logState()
 {
   mc_model_checker->getChecker()->logState();
 
-  if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
+  if (not _sg_mc_dot_output_file.empty()) {
     fprintf(dot_output, "}\n");
     fclose(dot_output);
   }