From 2a3f6e4d7009cc6c6105e45ae07c135e9455ecb9 Mon Sep 17 00:00:00 2001
From: Keewis <keewis@posteo.de>
Date: Sun, 2 Aug 2020 19:28:01 +0200
Subject: [PATCH] don't try to split along ', '

---
 sphinx/util/docfields.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sphinx/util/docfields.py b/sphinx/util/docfields.py
index c07bc7f66..55c00c2ec 100644
--- a/sphinx/util/docfields.py
+++ b/sphinx/util/docfields.py
@@ -322,6 +322,8 @@ class DocFieldTransformer:
             if typedesc.is_typed:
                 try:
                     argtype, argname = fieldarg.split(None, 1)
+                    if argtype.endswith(","):
+                        raise ValueError
                 except ValueError:
                     pass
                 else: