fix with safe_infer :)

Author: sshane

pylint/checkers/utils.py

@@ -1174,10 +1174,8 @@ def class_is_abstract(node: nodes.ClassDef) -> bool:
 
     # As well as directly inherited ABC class
     for base in node.bases:
-        base_class_name = (
-            base.attrname if isinstance(base, astroid.Attribute) else base.as_string()
-        )
-        if base_class_name == "ABC":
+        inferred_base = safe_infer(base)
+        if inferred_base.name == "abc" and inferred_base.root().name == "ABC":
             # abc.ABC inheritance
             return True