[RenderPather] warn about unrendered paths on deletion

masque/builder/renderpather.py

@@ -72,6 +72,10 @@ class RenderPather(PatherMixin):
     def ports(self, value: dict[str, Port]) -> None:
         self.pattern.ports = value
 
+    def __del__(self) -> None:
+        if any(pp for pp in self.paths):
+            logger.warning('RenderPather had unrendered paths', stack_info=True)
+
     def __init__(
             self,
             library: ILibrary,