X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d656f9465e7b1c36319f86eeafdcec58fe9551a4..0e7d247670cc012d8e784d0c8bcbb70a1c0bb9c6:/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);
   }