From eb0f353716af3cf774e8c2d9a6c8bdaf06d13a23 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 27 Aug 2021 06:42:56 +0200
Subject: [PATCH] Session-cleanup: clear route references from graph

resort_routes() is a no-op during session destruction,
however _current_route_graph can still hold references
to routes. A GraphVertex is-a boost::shared_ptr<Route>.
---
 libs/ardour/session.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 7dfa97abb5..bc20361e2f 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -2173,6 +2173,9 @@ Session::resort_routes ()
 	*/
 
 	if (inital_connect_or_deletion_in_progress ()) {
+		/* drop any references during delete */
+		GraphEdges edges;
+		_current_route_graph = edges;
 		return;
 	}