! expect return 255
$ $SG_TEST_EXENV ./dax_test --log=no_loc ${srcdir:=.}/../2clusters.xml ${srcdir:=.}/simple_dax_with_cycle.xml
-> [0.000000] [surf_workstation/INFO] surf_workstation_model_init_ptask_L07
+> [0.000000] [xbt_cfg/INFO] Switching to the L07 model to handle parallel tasks.
> [0.000000] [sd_daxparse/WARNING] the task root is not marked
> [0.000000] [sd_daxparse/WARNING] the task 1@task1 is in a cycle
> [0.000000] [sd_daxparse/WARNING] the task 2@task2 is in a cycle