Handle AttributeError from getall() and getslots()

sphinx/ext/autodoc/__init__.py

@@ -990,6 +990,10 @@ class ModuleDocumenter(Documenter):
         try:
             if not self.options.ignore_module_all:
                 self.__all__ = inspect.getall(self.object)
+        except AttributeError as exc:
+            # __all__ raises an error.
+            logger.warning(__('%s.__all__ raises an error. Ignored: %r'),
+                           (self.fullname, exc), type='autodoc')
         except ValueError as exc:
             # invalid __all__ found.
             logger.warning(__('__all__ should be a list of strings, not %r '
@@ -2263,11 +2267,17 @@ class SlotsAttributeDocumenter(AttributeDocumenter):
                           % self.__class__.__name__,
                           RemovedInSphinx50Warning, stacklevel=2)
         name = self.objpath[-1]
-        __slots__ = inspect.getslots(self.parent)
-        if __slots__ and isinstance(__slots__.get(name, None), str):
-            docstring = prepare_docstring(__slots__[name])
-            return [docstring]
-        else:
+
+        try:
+            __slots__ = inspect.getslots(self.parent)
+            if __slots__ and isinstance(__slots__.get(name, None), str):
+                docstring = prepare_docstring(__slots__[name])
+                return [docstring]
+            else:
+                return []
+        except (AttributeError, ValueError) as exc:
+            logger.warning(__('Invalid __slots__ found on %s. Ignored.'),
+                           (self.parent.__qualname__, exc), type='autodoc')
             return []
 
 

sphinx/ext/autodoc/importer.py

@@ -210,7 +210,7 @@ def get_object_members(subject: Any, objpath: List[str], attrgetter: Callable,
 
             for name in __slots__:
                 members[name] = Attribute(name, True, SLOTSATTR)
-    except (TypeError, ValueError):
+    except (AttributeError, TypeError, ValueError):
         pass
 
     # other members

sphinx/util/inspect.py

@@ -141,6 +141,7 @@ def getall(obj: Any) -> Optional[Sequence[str]]:
     """Get __all__ attribute of the module as dict.
 
     Return None if given *obj* does not have __all__.
+    Raises AttributeError if given *obj* raises an error on accessing __all__.
     Raises ValueError if given *obj* have invalid __all__.
     """
     __all__ = safe_getattr(obj, '__all__', None)
@@ -157,6 +158,8 @@ def getslots(obj: Any) -> Optional[Dict]:
     """Get __slots__ attribute of the class as dict.
 
     Return None if gienv *obj* does not have __slots__.
+    Raises AttributeError if given *obj* raises an error on accessing __slots__.
+    Raises ValueError if given *obj* have invalid __slots__.
     """
     if not inspect.isclass(obj):
         raise TypeError