-XBT_PRIVATE void MC_show_stack_safety(xbt_fifo_t stack);
-XBT_PRIVATE void MC_dump_stack_safety(xbt_fifo_t stack);
-
-/** Stack (of `mc_state_t`) representing the current position of the
- * the MC in the exploration graph
- *
- * It is managed by its head (`xbt_fifo_shift` and `xbt_fifo_unshift`).
- */
-XBT_PRIVATE extern xbt_fifo_t mc_stack;