From c0fe67427d3e0490eb7e8efe85a24811404e133c Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 16 Apr 2021 22:14:25 +0200
Subject: [PATCH] Fix crash if no audition synth is unset

This was possible if a user explicitly selects "-none-" from
the instrument dropdown.
---
 libs/ardour/auditioner.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libs/ardour/auditioner.cc b/libs/ardour/auditioner.cc
index 2372d29c12..163d9d973e 100644
--- a/libs/ardour/auditioner.cc
+++ b/libs/ardour/auditioner.cc
@@ -130,6 +130,14 @@ void
 Auditioner::load_synth (bool need_lock)
 {
 	unload_synth(need_lock);
+
+	if (!audition_synth_info) {
+		lookup_fallback_synth ();
+	}
+
+	if (!audition_synth_info) {
+		return;
+	}
 	
 	boost::shared_ptr<Plugin> p = audition_synth_info->load (_session);
 	if (p) {