From 1b857b66c92cd131c5efeb7c0c6ca18f8d43bbee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tin=20Tvrtkovi=C4=87?= <tinchester@gmail.com>
Date: Wed, 6 Mar 2024 00:26:39 +0100
Subject: [PATCH] Handle TypeVars after all

---
 src/cattrs/gen/__init__.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cattrs/gen/__init__.py b/src/cattrs/gen/__init__.py
index 13dea8ba..e7a93fd7 100644
--- a/src/cattrs/gen/__init__.py
+++ b/src/cattrs/gen/__init__.py
@@ -680,6 +680,8 @@ def make_iterable_unstructure_fn(
     # against IndexError.
     if getattr(cl, "__args__", None) not in (None, ()):
         type_arg = cl.__args__[0]
+        if isinstance(type_arg, TypeVar):
+            type_arg = getattr(type_arg, "__default__", Any)
         handler = converter.get_unstructure_hook(type_arg, cache_result=False)
         if handler == identity:
             # Save ourselves the trouble of iterating over it all.