From 3cc8774eb3be845e27e7fd1e2cdd514d7eddb4d1 Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Fri, 19 Jan 2024 16:35:36 +1100
Subject: [PATCH] Fix race in ExportStatusWriter

---
 internal/testutil/status_writer.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/internal/testutil/status_writer.go b/internal/testutil/status_writer.go
index ac872d57c0..bcc5c2b5d6 100644
--- a/internal/testutil/status_writer.go
+++ b/internal/testutil/status_writer.go
@@ -40,7 +40,9 @@ func ExportStatusWriter(sw StatusWriter, path string, t testing.TB) (release fun
 	http.HandleFunc(
 		pattern,
 		func(w http.ResponseWriter, r *http.Request) {
+			mu.Lock()
 			sw := sws[pattern]
+			mu.Unlock()
 			if sw == nil {
 				http.NotFound(w, r)
 				return