From a41699737f754569ff809d88a6b2d83ec1d6daf1 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 23 Apr 2025 14:34:19 -0600
Subject: [PATCH] fix bug in lifetime of MidiView::_ghost_note

As noted in 8b389ee8296f, we now clear the _note_group container
before any other Note items might be deleted. But since this
may delete the _ghost_note, we have to be sure to reset
that to a null ptr to avoid a double-free later during
~MidiView
---
 gtk2_ardour/midi_view.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtk2_ardour/midi_view.cc b/gtk2_ardour/midi_view.cc
index d8469e4af5..408f23b118 100644
--- a/gtk2_ardour/midi_view.cc
+++ b/gtk2_ardour/midi_view.cc
@@ -884,6 +884,8 @@ MidiView::clear_events ()
 	 * NoteBase objects we just deleted.
 	 */
 	_note_group->clear (true);
+	/* the above line deleted the ghost note (if any). Make sure we know */
+	_ghost_note = nullptr;
 	_events.clear();
 	_patch_changes.clear();
 	_sys_exes.clear();