From 45f1220aa5bcfd7b2dd4a064a4ba6683f4f6e27f Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 15 Jul 2019 00:55:51 +0200
Subject: [PATCH] Fix deadlock when removing routes (initialization issues)

_setup_chain needs to point to the unused graph-chain, and not
_current_chain. Otherwise Graph::clear_other_chain() waits forever.
---
 libs/ardour/graph.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/ardour/graph.cc b/libs/ardour/graph.cc
index 45edd1ebbc..1d6218917e 100644
--- a/libs/ardour/graph.cc
+++ b/libs/ardour/graph.cc
@@ -62,7 +62,7 @@ Graph::Graph (Session& session)
 	, _graph_empty (true)
 	, _current_chain (0)
 	, _pending_chain (0)
-	, _setup_chain (0)
+	, _setup_chain (1)
 {
 	g_atomic_int_set (&_terminal_refcnt, 0);
 	g_atomic_int_set (&_terminate, 0);