From f4aee7948f1fe20002df4cfce82878d3d070555e Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@audacityteam.org>
Date: Mon, 27 Jun 2016 23:38:42 -0400
Subject: [PATCH] Bug1429: Fix Mac crash in 2nd Audacity process enabling VST
 plugins

---
 src/Track.cpp | 7 ++++---
 src/Track.h   | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/Track.cpp b/src/Track.cpp
index 3218c1448..a92f7402d 100644
--- a/src/Track.cpp
+++ b/src/Track.cpp
@@ -770,7 +770,7 @@ void TrackList::Swap(TrackList &that)
 
 TrackList::~TrackList()
 {
-   Clear();
+   Clear(false);
 }
 
 void TrackList::RecalcPositions(TrackNodePointer node)
@@ -956,10 +956,11 @@ TrackNodePointer TrackList::Remove(Track *t)
    return result;
 }
 
-void TrackList::Clear()
+void TrackList::Clear(bool sendEvent)
 {
    ListOfTracks::clear();
-   UpdatedEvent(end());
+   if (sendEvent)
+      UpdatedEvent(end());
 }
 
 void TrackList::Select(Track * t, bool selected /* = true */ )
diff --git a/src/Track.h b/src/Track.h
index 79c6e3e50..e4a3ba99c 100644
--- a/src/Track.h
+++ b/src/Track.h
@@ -448,7 +448,7 @@ class TrackList final : public wxEvtHandler, public ListOfTracks
    TrackNodePointer Remove(Track *t);
 
    /// Make the list empty
-   void Clear();
+   void Clear(bool sendEvent = true);
 
    /** Select a track, and if it is linked to another track, select it, too. */
    void Select(Track * t, bool selected = true);