Fixed #29244 -- Prevented Paginator.count() from silencing TypeError and AttributeError.

django/core/paginator.py

@@ -1,8 +1,10 @@
 import collections.abc
+import inspect
 import warnings
 from math import ceil
 
 from django.utils.functional import cached_property
+from django.utils.inspect import method_has_no_args
 from django.utils.translation import gettext_lazy as _
 
 
@@ -83,13 +85,10 @@ class Paginator:
     @cached_property
     def count(self):
         """Return the total number of objects, across all pages."""
-        try:
-            return self.object_list.count()
-        except (AttributeError, TypeError):
-            # AttributeError if object_list has no count() method.
-            # TypeError if object_list.count() requires arguments
-            # (i.e. is of type list).
-            return len(self.object_list)
+        c = getattr(self.object_list, 'count', None)
+        if callable(c) and not inspect.isbuiltin(c) and method_has_no_args(c):
+            return c()
+        return len(self.object_list)
 
     @cached_property
     def num_pages(self):