From 512c73cef9f91c7ce05149efdd3125512bf9e25e Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@victoriametrics.com>
Date: Mon, 19 Dec 2022 10:14:34 -0800
Subject: [PATCH] lib/storage: properly set buf capacity inside marshalMetricID

Previously it was always set to 0. In theory this could result into incorrect marshaling
of metricIDs.

The issue has been introduced in 5e4dfe50c6b30aa49aefd911176433783a3aca4a
---
 lib/storage/index_db.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/storage/index_db.go b/lib/storage/index_db.go
index e61abe756..c0edb40b3 100644
--- a/lib/storage/index_db.go
+++ b/lib/storage/index_db.go
@@ -456,8 +456,8 @@ func marshalMetricIDs(dst []byte, metricIDs []uint64) []byte {
 	var buf []byte
 	sh := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
 	sh.Data = uintptr(unsafe.Pointer(&metricIDs[0]))
-	sh.Cap = sh.Len
-	sh.Len = 8 * len(metricIDs)
+	sh.Cap = 8 * len(metricIDs)
+	sh.Len = sh.Cap
 	dst = append(dst, buf...)
 	return dst
 }