Fixed issue with bus operations deletion

api/scaffold/__init__.py

@@ -2020,6 +2020,10 @@ def delay(self, duration: float):
         cycles = round(duration * self.sys_freq)
         self.bus.delay(cycles)
 
+    def wait(self):
+        """Wait for all pending operations to be completed."""
+        self.bus.wait()
+
 
 class Scaffold(ArchBase):
     """

api/scaffold/bus.py

@@ -70,9 +70,6 @@ def __init__(self):
         self.bus = None
         self.status = OperationStatus.PENDING
 
-    def __del__(self):
-        assert self.status in (OperationStatus.COMPLETED, OperationStatus.TIMEOUT)
-
     def wait(self):
         """Wait until this operation has been processed."""
         if self.status == OperationStatus.PENDING:
@@ -354,10 +351,10 @@ def __init__(self, sys_freq, baudrate):
         self.__fifo_size = 0
         self.version = None
 
-    def __del__(self):
+    def wait(self):
+        """Wait for all pending operations to be completed."""
         while len(self.__operations) > 0:
             self.resolve_next_operation()
-        del self.__operations
 
     def connect(self, dev):
         """