if ((*request)->action != NULL) { // this is not a detached send
simcall_comm_wait((*request)->action, -1.0);
#ifdef HAVE_MC
- if(MC_is_active())
+ if(MC_is_active() && (*request)->action)
(*request)->action->comm.dst_data = NULL; // dangling pointer : dst_data is freed with a wait, need to set it to NULL for system state comparison
#endif
}