From dca0e6fbe290022eae0b3ff694c4de3354d3d08e Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 28 Aug 2015 18:48:40 +0200
Subject: fix crash with missing .mid

assert in ARDOUR::MidiRegion::control() boost::shared_ptr<ARDOUR::MidiModel>::operator-> invalid ptr.
see http://pastebin.com/dTV10Zu6
---
 libs/ardour/midi_track.cc | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'libs/ardour/midi_track.cc')

diff --git a/libs/ardour/midi_track.cc b/libs/ardour/midi_track.cc
index 6d7b4519c5..fc1ab21b53 100644
--- a/libs/ardour/midi_track.cc
+++ b/libs/ardour/midi_track.cc
@@ -513,6 +513,11 @@ MidiTrack::non_realtime_locate (framepos_t pos)
 		return;
 	}
 
+	/* the source may be missing, but the control still referenced in the GUI */
+	if (!region->midi_source() || !region->model()) {
+		return;
+	}
+
 	Glib::Threads::Mutex::Lock lm (_control_lock, Glib::Threads::TRY_LOCK);
 	if (!lm.locked()) {
 		return;
-- 
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