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-rw-r--r--lib/Core/Executor.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Core/Executor.h b/lib/Core/Executor.h
index 99f5921b..92edc364 100644
--- a/lib/Core/Executor.h
+++ b/lib/Core/Executor.h
@@ -122,12 +122,12 @@ private:
   /// instructions step. 
   /// \invariant \ref addedStates is a subset of \ref states. 
   /// \invariant \ref addedStates and \ref removedStates are disjoint.
-  std::set<ExecutionState*> addedStates;
+  std::vector<ExecutionState *> addedStates;
   /// Used to track states that have been removed during the current
   /// instructions step. 
   /// \invariant \ref removedStates is a subset of \ref states. 
   /// \invariant \ref addedStates and \ref removedStates are disjoint.
-  std::set<ExecutionState*> removedStates;
+  std::vector<ExecutionState *> removedStates;
 
   /// When non-empty the Executor is running in "seed" mode. The
   /// states in this map will be executed in an arbitrary order