From a72db29ae052f3c8a6d8085be2dccf663aca8584 Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Sat, 13 Mar 2021 04:27:16 +0100
Subject: [PATCH] Mutex protect buffer access in standard renderer

---
 standard_renderer.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/standard_renderer.go b/standard_renderer.go
index 5fb48e8..4a4079a 100644
--- a/standard_renderer.go
+++ b/standard_renderer.go
@@ -88,6 +88,9 @@ func (r *standardRenderer) listen() {
 
 // flush renders the buffer.
 func (r *standardRenderer) flush() {
+	r.mtx.Lock()
+	defer r.mtx.Unlock()
+
 	if r.buf.Len() == 0 || r.buf.String() == r.lastRender {
 		// Nothing to do
 		return
@@ -95,9 +98,6 @@ func (r *standardRenderer) flush() {
 
 	out := new(bytes.Buffer)
 
-	r.mtx.Lock()
-	defer r.mtx.Unlock()
-
 	// Clear any lines we painted in the last render.
 	if r.linesRendered > 0 {
 		for i := r.linesRendered - 1; i > 0; i-- {