From 0e799357a81f009064d3ac21f515de6fa108bd10 Mon Sep 17 00:00:00 2001
From: Marijn Kruisselbrink <mek@google.com>
Date: Wed, 8 Dec 2021 14:10:58 -0800
Subject: [PATCH] Fix crash in mackie strip code.

Strip::notify_property_changed accesses _stripable without verifying
that is not null. However it is possible for this to be null, so
add a null check.
---
 libs/surfaces/mackie/strip.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/surfaces/mackie/strip.cc b/libs/surfaces/mackie/strip.cc
index 25ef65557c..e3c26b4fdc 100644
--- a/libs/surfaces/mackie/strip.cc
+++ b/libs/surfaces/mackie/strip.cc
@@ -389,6 +389,10 @@ Strip::notify_processor_changed (bool force_update)
 void
 Strip::notify_property_changed (const PropertyChange& what_changed)
 {
+	if (!_stripable) {
+		return;
+	}
+
 	if (what_changed.contains (ARDOUR::Properties::name)) {
 		show_stripable_name ();
 	}