test Enum class cannot be generic

Author: elazarg

test-data/unit/check-enum.test

@@ -29,7 +29,14 @@ class Medal(Achievement):
     bronze = None
 reveal_type(Medal.bronze)  # E: Revealed type is '__main__.Medal'
 m = Medal.gold
-m = 1  # E: Incompatible types in assignment (expression has type "int", variable has type "Medal")
+m = 1  # E: Incompatible types inassignment (expression has type "int", variable has type "Medal")
+
+[case testEnumFromEnumMetaGeneric]
+from enum import EnumMeta
+from typing import Generic, TypeVar
+T = TypeVar("T")
+class Medal(Generic[T], metaclass=EnumMeta):  # E: Enum class cannot be generic
+    q = None
 
 [case testEnumNameAndValue]
 from enum import Enum