From 1fc9750d1886c0a7822965700e6501090f92f4cc Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 29 May 2013 23:33:52 +0300
Subject: [PATCH] Don't fail when adding multiple tracks to an initially empty
 Route

---
 source/libr2c2/route.cpp | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/source/libr2c2/route.cpp b/source/libr2c2/route.cpp
index 788b235..38ea9f6 100644
--- a/source/libr2c2/route.cpp
+++ b/source/libr2c2/route.cpp
@@ -272,14 +272,21 @@ void Route::add_tracks(const set<Track *> &trks)
 		if(!tracks.count(*i))
 			pending.insert(*i);
 
+	if(tracks.empty())
+	{
+		set<Track *>::iterator i = pending.begin();
+		tracks.insert(*i);
+		pending.erase(i);
+	}
+
 	while(!pending.empty())
 	{
 		RouteValidityMask valid = ROUTE_INVALID;
-		for(set<Track *>::const_iterator i=pending.begin(); i!=pending.end(); ++i)
-			if(tracks.empty() || (valid=check_validity(**i))==ROUTE_VALID)
+		for(set<Track *>::iterator i=pending.begin(); i!=pending.end(); ++i)
+			if((valid=check_validity(**i))==ROUTE_VALID)
 			{
 				tracks.insert(*i);
-				pending.erase(*i);
+				pending.erase(i);
 				break;
 			}
 
-- 
2.43.0