From fe50213c78bb06a8d8a77ad55c0ea6198a8b947a Mon Sep 17 00:00:00 2001
From: Aleksandr Razumov <ernado@ya.ru>
Date: Tue, 14 Jun 2022 11:58:31 +0300
Subject: [PATCH] fix(proto): handle index out of range in low cardinality

---
 proto/col_low_cardinality.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/proto/col_low_cardinality.go b/proto/col_low_cardinality.go
index e182449d..c1c2851a 100644
--- a/proto/col_low_cardinality.go
+++ b/proto/col_low_cardinality.go
@@ -185,6 +185,9 @@ func (c *ColLowCardinality[T]) DecodeColumn(r *Reader, rows int) error {
 
 	c.Values = c.Values[:0]
 	for _, idx := range c.keys {
+		if int64(idx) >= indexRows {
+			return errors.Errorf("key index out of range [%d] with length %d", idx, indexRows)
+		}
 		c.Values = append(c.Values, c.index.Row(idx))
 	}