From 8d56900ff4a7f0e38bd0fd617d2823cd02bf8f88 Mon Sep 17 00:00:00 2001
From: Tom Close <tom.g.close@gmail.com>
Date: Wed, 6 Sep 2023 16:50:17 +1000
Subject: [PATCH] fixed up subclass checking of unions

---
 pydra/utils/typing.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydra/utils/typing.py b/pydra/utils/typing.py
index ceddc7e219..21718d3c29 100644
--- a/pydra/utils/typing.py
+++ b/pydra/utils/typing.py
@@ -649,7 +649,7 @@ def is_subclass(
                     else:
                         candidate_args = [candidate]
                     return all(
-                        any(cls.is_subclass(a, c) for a in args) for c in candidate_args
+                        any(cls.is_subclass(a, c) for c in candidate_args) for a in args
                     )
                 if origin is not None:
                     klass = origin