set keyval to invalid after free

diff --git a/src/smpi/include/smpi_keyvals.hpp b/src/smpi/include/smpi_keyvals.hpp
index 7fd5e30..d323786 100644 (file)
--- a/src/smpi/include/smpi_keyvals.hpp
+++ b/src/smpi/include/smpi_keyvals.hpp
@@ -90,6 +90,7 @@ template <typename T> int Keyval::keyval_free(int* keyval){
   }else{
     elem->refcount--;
   }
+  *keyval = MPI_KEYVAL_INVALID;
   return MPI_SUCCESS;
 }