pythongh-93847: Fix repr of enum of generic aliases

Author: serhiy-storchaka

Lib/enum.py

@@ -1237,7 +1237,7 @@ def _missing_(cls, value):
         return None
 
     def __repr__(self):
-        v_repr = self.__class__._value_repr_ or self._value_.__class__.__repr__
+        v_repr = self.__class__._value_repr_ or repr
         return "<%s.%s: %s>" % (self.__class__.__name__, self._name_, v_repr(self._value_))
 
     def __str__(self):
@@ -1509,7 +1509,7 @@ def __len__(self):
 
     def __repr__(self):
         cls_name = self.__class__.__name__
-        v_repr = self.__class__._value_repr_ or self._value_.__class__.__repr__
+        v_repr = self.__class__._value_repr_ or repr
         if self._name_ is None:
             return "<%s: %s>" % (cls_name, v_repr(self._value_))
         else:

Lib/test/test_enum.py

@@ -6,6 +6,7 @@
 import sys
 import unittest
 import threading
+import typing
 import builtins as bltns
 from collections import OrderedDict
 from datetime import date
@@ -972,6 +973,15 @@ class SpamEnum(Enum):
             spam = SpamEnumNotInner
         self.assertEqual(SpamEnum.spam.value, SpamEnumNotInner)
 
+    def test_enum_of_generic_aliases(self):
+        class E(Enum):
+            a = typing.List[int]
+            b = list[int]
+        self.assertEqual(E.a.value, typing.List[int])
+        self.assertEqual(E.b.value, list[int])
+        self.assertEqual(repr(E.a), '<E.a: typing.List[int]>')
+        self.assertEqual(repr(E.b), '<E.b: list[int]>')
+
     @unittest.skipIf(
             python_version >= (3, 13),
             'inner classes are not members',

Misc/NEWS.d/next/Library/2022-06-16-09-24-50.gh-issue-93847.kuv8bN.rst

@@ -0,0 +1 @@
+Fix repr of enum of generic aliases.