From c6fa1ea1f7c6f2c5d3253bf6834f01f11cf5ae6f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dag=20Henning=20Liodden=20S=C3=B8rb=C3=B8?=
 <daghenning@lioddensorbo.com>
Date: Tue, 5 Jun 2018 20:19:35 +0200
Subject: [PATCH] fix #273080 - Visible mixer with no score leads to instant
 crash on startup

---
 mscore/mixer.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mscore/mixer.cpp b/mscore/mixer.cpp
index 5ac2f2f742..cad35ff67e 100644
--- a/mscore/mixer.cpp
+++ b/mscore/mixer.cpp
@@ -390,6 +390,9 @@ void Mixer::midiPrefsChanged(bool showMidiControls)
 
 void MuseScore::showMixer(bool val)
       {
+      if (!cs)
+            return;
+
       QAction* a = getAction("toggle-mixer");
       if (mixer == 0) {
             mixer = new Mixer(this);