From e3e3a940c75dcad126d5cf08f0802efdab914568 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 5 Jul 2013 18:32:13 +0300
Subject: [PATCH] Prevent segfault during layout destruction

---
 source/libr2c2/trackattachment.cpp | 10 +++++++++-
 source/libr2c2/trackattachment.h   |  5 ++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/source/libr2c2/trackattachment.cpp b/source/libr2c2/trackattachment.cpp
index bed7db8..3d28651 100644
--- a/source/libr2c2/trackattachment.cpp
+++ b/source/libr2c2/trackattachment.cpp
@@ -10,7 +10,9 @@ namespace R2C2 {
 TrackAttachment::TrackAttachment(Layout &l):
 	Object(l),
 	offset(0)
-{ }
+{
+	layout.signal_object_removed.connect(sigc::mem_fun(this, &TrackAttachment::object_removed));
+}
 
 TrackAttachment::~TrackAttachment()
 {
@@ -92,4 +94,10 @@ float TrackAttachment::find_offset(const TrackIter &trk, const Vector &point)
 	return offs;
 }
 
+void TrackAttachment::object_removed(Object &o)
+{
+	if(&o==track.track())
+		track = TrackIter();
+}
+
 } // namespace R2C"
diff --git a/source/libr2c2/trackattachment.h b/source/libr2c2/trackattachment.h
index 8551250..d02a443 100644
--- a/source/libr2c2/trackattachment.h
+++ b/source/libr2c2/trackattachment.h
@@ -6,7 +6,7 @@
 
 namespace R2C2 {
 
-class TrackAttachment: public Object
+class TrackAttachment: public Object, public sigc::trackable
 {
 protected:
 	TrackIter track;
@@ -27,6 +27,9 @@ protected:
 
 public:
 	virtual Track *get_parent() const { return track.track(); }
+
+private:
+	void object_removed(Object &);
 };
 
 } // namespace R2C2
-- 
2.43.0