message: Check for the existence of an annotation before attempting to fetch it.
diff: @@ -67,6 +67,9 @@ class ListTransformer(transformer.Base):
  node = self.generic_visit(node)
  if isinstance(node.value, gast.Call):
  call_node = node.value
  +
  + if not anno.hasanno(call_node.func, anno.Basic.QN):
  + return node
  qn = anno.getanno(call_node.func, anno.Basic.QN)
  if qn.qn[-1] == 'append' and (len(call_node.args) == 1):
  