Fix issue with unknown base on attribute call (throw an error)

Signed-off-by: Alex McCaskey <amccaskey@nvidia.com>

python/cudaq/kernel/ast_bridge.py

@@ -1629,6 +1629,10 @@ def bodyBuilder(iterVal):
                 # Method call on one of our variables
                 var = self.symbolTable[node.func.value.id]
                 if quake.VeqType.isinstance(var.type):
+                    if node.func.attr == 'size':
+                        # Handled already in the Attribute visit
+                        return 
+
                     # `qreg` or `qview` method call
                     if node.func.attr == 'back':
                         qrSize = quake.VeqSizeOp(self.getIntegerType(),
@@ -1804,6 +1808,9 @@ def bodyBuilder(iterVal):
                     f'Unknown attribute on quantum operation {node.func.value.id} ({node.func.attr}). {maybeProposeOpAttrFix(node.func.value.id, node.func.attr)}'
                 )
 
+            self.emitFatalError(f"Invalid function call - '{node.func.value.id}' is unknown.")
+
+
     def visit_ListComp(self, node):
         """
         This method currently supports lowering simple list comprehensions