From 41827a546a3fd8c8fb4095845f6b80f1f36ce048 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 8 Dec 2018 20:15:53 +0100
Subject: [PATCH] Fix crash when closing session, recursive mon-section removal

---
 gtk2_ardour/ardour_ui2.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gtk2_ardour/ardour_ui2.cc b/gtk2_ardour/ardour_ui2.cc
index 97d639fc1b..53bccb64bc 100644
--- a/gtk2_ardour/ardour_ui2.cc
+++ b/gtk2_ardour/ardour_ui2.cc
@@ -821,6 +821,10 @@ ARDOUR_UI::update_title ()
 void
 ARDOUR_UI::toggle_use_monitor_section ()
 {
+	if (!_session) {
+		return;
+	}
+
 	RefPtr<Action> act = ActionManager::get_action (X_("Monitor"), "UseMonitorSection");
 	assert (act);  RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (act);
 	assert (tact);
-- 
2.30.2