From 99ad2eda0dbe6387a1c4593e84b77191e045d39b Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Thu, 13 Oct 2022 06:48:26 +0200
Subject: [PATCH] fix: also lock mutex when accessing state read-only

---
 standard_renderer.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/standard_renderer.go b/standard_renderer.go
index 9260e5e..7d68b41 100644
--- a/standard_renderer.go
+++ b/standard_renderer.go
@@ -264,6 +264,9 @@ func (r *standardRenderer) clearScreen() {
 }
 
 func (r *standardRenderer) altScreen() bool {
+	r.mtx.Lock()
+	defer r.mtx.Unlock()
+
 	return r.altScreenActive
 }