From e9d252b3af699ad626ed4e877ec20ccd00a8f6c8 Mon Sep 17 00:00:00 2001
From: beorn7 <beorn@grafana.com>
Date: Wed, 3 May 2023 18:38:36 +0200
Subject: [PATCH] expfmt: Avoid copying mutex in proto message

Signed-off-by: beorn7 <beorn@grafana.com>
---
 expfmt/decode.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/expfmt/decode.go b/expfmt/decode.go
index f4fc8845..90639781 100644
--- a/expfmt/decode.go
+++ b/expfmt/decode.go
@@ -132,7 +132,10 @@ func (d *textDecoder) Decode(v *dto.MetricFamily) error {
 	}
 	// Pick off one MetricFamily per Decode until there's nothing left.
 	for key, fam := range d.fams {
-		*v = *fam
+		v.Name = fam.Name
+		v.Help = fam.Help
+		v.Type = fam.Type
+		v.Metric = fam.Metric
 		delete(d.fams, key)
 		return nil
 	}