Fix undocumented class attribute (#165)

Author: felix-hilden

docs/src/release_notes.rst

@@ -14,6 +14,7 @@ sphinx-codeautolink adheres to
   where reference documentation does not appear to have
   a corresponding tutorial or how-to (:issue:`161`)
 - Add more Pygments lexer aliases in code blocks (:issue:`160`)
+- Fix undocumented class attribute leading to a crash (:issue:`165`)
 
 0.16.2 (2025-01-16)
 -------------------

src/sphinx_codeautolink/extension/resolve.py

@@ -86,8 +86,9 @@ def locate_type(cursor: Cursor, components: tuple[str, ...], inventory) -> Curso
             with suppress(AttributeError, TypeError):
                 cursor.location = fully_qualified_name(cursor.value)
 
+        # Check bases if member not found in current class
         if isclass(previous.value) and cursor.location not in inventory:
-            for val in previous.value.__mro__:
+            for val in previous.value.__mro__[1:]:
                 name = fully_qualified_name(val)
                 if name + "." + component in inventory:
                     previous.location = name

tests/extension/ref/class_mro_fix.txt

@@ -0,0 +1,15 @@
+class_mro_fix
+Parameter
+# split
+codeautolink_warn_on_missing_inventory = False
+# split
+Test project
+============
+
+.. code:: python
+
+   from class_mro_fix import Parameter
+
+   Parameter.empty
+
+.. automodule:: class_mro_fix

tests/extension/src/class_mro_fix.py

@@ -0,0 +1,10 @@
+# noqa: INP001
+# Test an edge case that happens in the inspect module, see #165 for details
+
+
+class _empty:  # noqa: N801
+    pass
+
+
+class Parameter:
+    empty = _empty