From da4f091c211ccf30a8a7591c4881027fe1d74c35 Mon Sep 17 00:00:00 2001
From: Matthias Geier <Matthias.Geier@gmail.com>
Date: Sat, 24 Oct 2020 20:55:06 +0200
Subject: [PATCH] autodoc: check whether __slots__ is a str

Closes #8294.
---
 sphinx/ext/autodoc/importer.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sphinx/ext/autodoc/importer.py b/sphinx/ext/autodoc/importer.py
index 133ce1439c9..52b07639af6 100644
--- a/sphinx/ext/autodoc/importer.py
+++ b/sphinx/ext/autodoc/importer.py
@@ -206,7 +206,10 @@ def get_object_members(subject: Any, objpath: List[str], attrgetter: Callable,
     if isclass(subject) and getattr(subject, '__slots__', None) is not None:
         from sphinx.ext.autodoc import SLOTSATTR
 
-        for name in subject.__slots__:
+        slots = subject.__slots__
+        if isinstance(slots, str):
+            slots = [slots]
+        for name in slots:
             members[name] = Attribute(name, True, SLOTSATTR)
 
     # other members