From e61670a657a9d98f801f57f0d97c2e3a739a3d5c Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 3 Mar 2025 18:25:21 +0100
Subject: [PATCH] Properly drop Pianoroll references

---
 gtk2_ardour/pianoroll.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtk2_ardour/pianoroll.cc b/gtk2_ardour/pianoroll.cc
index 4548d53521..6c86b376ec 100644
--- a/gtk2_ardour/pianoroll.cc
+++ b/gtk2_ardour/pianoroll.cc
@@ -2236,6 +2236,8 @@ Pianoroll::set_region (std::shared_ptr<ARDOUR::MidiRegion> r)
 	view->show_start (true);
 	view->show_end (true);
 
+	r->DropReferences.connect (object_connections, invalidator (*this), std::bind (&Pianoroll::unset, this), gui_context());
+
 	bool provided = false;
 	std::shared_ptr<Temporal::TempoMap> map;
 	std::shared_ptr<SMFSource> smf (std::dynamic_pointer_cast<SMFSource> (r->midi_source()));