From 86b119ac7ba206d294eb257f99c308fe8452bd58 Mon Sep 17 00:00:00 2001
From: Cyril Tovena <cyril.tovena@gmail.com>
Date: Thu, 6 Jun 2024 09:55:46 +0200
Subject: [PATCH] fix: Add copyString function to symbolizer to avoid retaining
  memory (#13146)

---
 pkg/chunkenc/symbols.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkg/chunkenc/symbols.go b/pkg/chunkenc/symbols.go
index bed4035400c7..a3e2a5b011e2 100644
--- a/pkg/chunkenc/symbols.go
+++ b/pkg/chunkenc/symbols.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"hash"
 	"io"
+	"strings"
 	"sync"
 
 	"github.com/pkg/errors"
@@ -78,6 +79,7 @@ func (s *symbolizer) add(lbl string) uint32 {
 
 	idx, ok = s.symbolsMap[lbl]
 	if !ok {
+		lbl = strings.Clone(lbl)
 		idx = uint32(len(s.labels))
 		s.symbolsMap[lbl] = idx
 		s.labels = append(s.labels, lbl)