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-rw-r--r--gnu/packages/patches/python-typing-inspect-fix.patch38
1 files changed, 38 insertions, 0 deletions
diff --git a/gnu/packages/patches/python-typing-inspect-fix.patch b/gnu/packages/patches/python-typing-inspect-fix.patch
new file mode 100644
index 0000000000..e6e28981b7
--- /dev/null
+++ b/gnu/packages/patches/python-typing-inspect-fix.patch
@@ -0,0 +1,38 @@
+From 16919e21936179e53df2f376c8b59b5fc44bd2dd Mon Sep 17 00:00:00 2001
+From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
+Date: Fri, 15 Jan 2021 09:22:52 -0500
+Subject: [PATCH] Fix for Python 3.9+.
+
+Fixes <https://github.com/ilevkivskyi/typing_inspect/issues/60>.
+
+Based on an idea in
+https://github.com/ilevkivskyi/typing_inspect/issues/60#issuecomment-683187584.
+---
+ typing_inspect.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/typing_inspect.py b/typing_inspect.py
+index 1ca68ed..31d05ee 100644
+--- a/typing_inspect.py
++++ b/typing_inspect.py
+@@ -21,7 +21,7 @@ LEGACY_TYPING = False
+
+ if NEW_TYPING:
+ from typing import (
+- Generic, Callable, Union, TypeVar, ClassVar, Tuple, _GenericAlias, ForwardRef
++ Generic, Callable, Union, TypeVar, ClassVar, Tuple, _GenericAlias, _SpecialGenericAlias, ForwardRef
+ )
+ from typing_extensions import Literal
+ else:
+@@ -75,7 +75,7 @@ def is_generic_type(tp):
+ """
+ if NEW_TYPING:
+ return (isinstance(tp, type) and issubclass(tp, Generic) or
+- isinstance(tp, _GenericAlias) and
++ (isinstance(tp, _GenericAlias) or isinstance(tp, _SpecialGenericAlias)) and
+ tp.__origin__ not in (Union, tuple, ClassVar, collections.abc.Callable))
+ return (isinstance(tp, GenericMeta) and not
+ isinstance(tp, (CallableMeta, TupleMeta)))
+--
+2.29.2
+