From 86ef6a96dd1766c0f54f8400067bc0f917abbce6 Mon Sep 17 00:00:00 2001
From: Nikolaus Gullotta <nik@harrisonconsoles.com>
Date: Tue, 30 Jul 2019 15:54:04 -0500
Subject: [PATCH] if the RouteList passed to create_snapshot is empty it will
 use the method (whcih I will eventualyl collapse into one method) that
 captures all the tracks in the session.

snapshots now create normally again
---
 libs/ardour/mixer_snapshot_manager.cc | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/mixer_snapshot_manager.cc b/libs/ardour/mixer_snapshot_manager.cc
index a1f83eed40..cdc77e2575 100644
--- a/libs/ardour/mixer_snapshot_manager.cc
+++ b/libs/ardour/mixer_snapshot_manager.cc
@@ -108,7 +108,15 @@ void MixerSnapshotManager::create_snapshot(std::string const& label, RouteList&
     ensure_snapshot_dir(global);
     const string path = global ? _global_path : _local_path;
     MixerSnapshot* snapshot = new MixerSnapshot(_session);
-    snapshot->snap(rl);
+
+    if(!rl.empty()) {
+        //just this routelist
+        snapshot->snap(rl);
+    } else {
+        //the whole session
+        snapshot->snap();
+    }
+
     snapshot->set_label(label);
     snapshot->write(path);
     refresh();