From e41b1ae52b9bc60670188bcae0bc823801ad994d Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Mon, 9 Nov 2020 19:35:43 +0300
Subject: [PATCH] Empty commit.

---
 src/Storages/MergeTree/KeyCondition.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Storages/MergeTree/KeyCondition.cpp b/src/Storages/MergeTree/KeyCondition.cpp
index b575da46fcb..6771d99c100 100644
--- a/src/Storages/MergeTree/KeyCondition.cpp
+++ b/src/Storages/MergeTree/KeyCondition.cpp
@@ -700,6 +700,9 @@ bool KeyCondition::canConstantBeWrappedByFunctions(
                         next_node = arg;
                     }
 
+                    if (!next_node)
+                        is_valid_chain = false;
+
                     cur_node = next_node;
                 }
                 else if (cur_node->type == ActionsDAG::Type::ALIAS)