Refs #23758 -- Used RecursionError instead of RuntimeError to raise nested subquery errors.

RecursionError was introduced in Python 3.5 and subclasses RuntimeError.

django/db/models/sql/query.py

@@ -894,7 +894,7 @@ class Query(BaseExpression):
                 self.alias_prefix = prefix
                 break
             if pos > local_recursion_limit:
-                raise RuntimeError(
+                raise RecursionError(
                     'Maximum recursion depth exceeded: too many subqueries.'
                 )
         self.subq_aliases = self.subq_aliases.union([self.alias_prefix])

tests/queries/tests.py

@@ -405,7 +405,7 @@ class Queries1Tests(TestCase):
         x = Tag.objects.filter(pk=1)
         local_recursion_limit = sys.getrecursionlimit() // 16
         msg = 'Maximum recursion depth exceeded: too many subqueries.'
-        with self.assertRaisesMessage(RuntimeError, msg):
+        with self.assertRaisesMessage(RecursionError, msg):
             for i in range(local_recursion_limit + 2):
                 x = Tag.objects.filter(pk__in=x)