[2.1.x] Fixed #29643 -- Fixed crash when combining Q objects with __in lookups and lists.

Regression in fc6528b25ab1834be1a478b405bf8f7ec5cf860c.
Backport of 9fee229874367beafd532dad6d0f9ff9676ded0b from master

1 files changed, 4 insertions, 1 deletions

diff --git a/django/utils/tree.py b/django/utils/tree.py
index 2a188acda7..421ad5cd3c 100644
--- a/django/utils/tree.py
+++ b/django/utils/tree.py
@@ -71,7 +71,10 @@ class Node:
         )
 
     def __hash__(self):
-        return hash((self.__class__, self.connector, self.negated) + tuple(self.children))
+        return hash((self.__class__, self.connector, self.negated) + tuple([
+            tuple(child) if isinstance(child, list) else child
+            for child in self.children
+        ]))
 
     def add(self, data, conn_type, squash=True):
         """