Refs #32508 -- Raised ValueError instead of using "assert" in lazy().

1 files changed, 4 insertions, 2 deletions

diff --git a/django/utils/functional.py b/django/utils/functional.py
index 5c8a0c233f..5f12aa08ff 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -119,8 +119,10 @@ def lazy(func, *resultclasses):
                         setattr(cls, method_name, meth)
             cls._delegate_bytes = bytes in resultclasses
             cls._delegate_text = str in resultclasses
-            assert not (cls._delegate_bytes and cls._delegate_text), (
-                "Cannot call lazy() with both bytes and text return types.")
+            if cls._delegate_bytes and cls._delegate_text:
+                raise ValueError(
+                    'Cannot call lazy() with both bytes and text return types.'
+                )
             if cls._delegate_text:
                 cls.__str__ = cls.__text_cast
             elif cls._delegate_bytes: