From e9912e2f7e7231f07b29ac865af59b5e22d8dec3 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@clickhouse.com>
Date: Sat, 6 May 2023 02:19:58 +0200
Subject: [PATCH] Fix wrong assert

---
 src/AggregateFunctions/AggregateFunctionNothing.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/AggregateFunctions/AggregateFunctionNothing.h b/src/AggregateFunctions/AggregateFunctionNothing.h
index 8491e8edfaa..8280d72c085 100644
--- a/src/AggregateFunctions/AggregateFunctionNothing.h
+++ b/src/AggregateFunctions/AggregateFunctionNothing.h
@@ -13,6 +13,11 @@ namespace DB
 {
 struct Settings;
 
+namespace ErrorCodes
+{
+    extern const int INCORRECT_DATA;
+}
+
 
 /** Aggregate function that takes arbitrary number of arbitrary arguments and does nothing.
   */
@@ -69,7 +74,8 @@ public:
     {
         [[maybe_unused]] char symbol;
         readChar(symbol, buf);
-        assert(symbol == '\0');
+        if (symbol != '\0')
+            throw Exception(ErrorCodes::INCORRECT_DATA, "Incorrect state of aggregate function 'nothing', it should contain exactly one zero byte.");
     }
 
     void insertResultInto(AggregateDataPtr __restrict, IColumn & to, Arena *) const override