Make sure that we never have a 0 transition at the end of the stack

[simgrid.git] / src / mc / explo / DFSExplorer.cpp

diff --git a/src/mc/explo/DFSExplorer.cpp b/src/mc/explo/DFSExplorer.cpp
index 5903739..bd8dbdc 100644 (file)
--- a/src/mc/explo/DFSExplorer.cpp
+++ b/src/mc/explo/DFSExplorer.cpp
@@ -81,8 +81,8 @@ std::vector<std::string> DFSExplorer::get_textual_trace() // override
   for (auto const& transition : stack_.back()->get_recipe()) {
     trace.push_back(xbt::string_printf("%ld: %s", transition->aid_, transition->to_string().c_str()));
   }
-  trace.push_back(xbt::string_printf("%ld: %s", stack_.back()->get_transition()->aid_,
-                                     stack_.back()->get_transition()->to_string().c_str()));
+  if (auto* trans = stack_.back()->get_transition(); trans != nullptr)
+    trace.push_back(xbt::string_printf("%ld: %s", trans->aid_, trans->to_string().c_str()));
   return trace;
 }