Fix Beta

src/machine/machine_state_impl.rs

@@ -3130,10 +3130,15 @@ impl MachineState {
     ) {
 	    let interrupted = INTERRUPT.load(std::sync::atomic::Ordering::Relaxed);
 
-	    if INTERRUPT.compare_and_swap(interrupted, false, std::sync::atomic::Ordering::Relaxed) {
+	    match INTERRUPT.compare_exchange(interrupted, false, std::sync::atomic::Ordering::Relaxed, std::sync::atomic::Ordering::Relaxed) {
+            Ok(interruption) => {
+                if interruption {
                     self.throw_interrupt_exception();
                     return;
                 }
+            },
+            Err(_) => unreachable!()
+	    }
 
         let mut default_call_policy: Box<dyn CallPolicy> = Box::new(DefaultCallPolicy {});