Fixed #19938 -- Consumed iterator only once in paginator's Page

Thanks Joshua Fialkoff for the report.

1 files changed, 3 insertions, 1 deletions

diff --git a/django/core/paginator.py b/django/core/paginator.py
index 9ccff51a34..c8b9377856 100644
--- a/django/core/paginator.py
+++ b/django/core/paginator.py
@@ -121,7 +121,9 @@ class Page(collections.Sequence):
             raise TypeError
         # The object_list is converted to a list so that if it was a QuerySet
         # it won't be a database hit per __getitem__.
-        return list(self.object_list)[index]
+        if not isinstance(self.object_list, list):
+            self.object_list = list(self.object_list)
+        return self.object_list[index]
 
     def has_next(self):
         return self.number < self.paginator.num_pages