From d697bf5388783d723d067281cef13d8c162faf02 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 29 Jan 2015 18:57:01 -0500
Subject: [PATCH] stop transport when process_routes fails, even when using the
 parallel graph execution model

---
 libs/ardour/session_process.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/session_process.cc b/libs/ardour/session_process.cc
index 497fbd4d2e..4e4b65ebb3 100644
--- a/libs/ardour/session_process.cc
+++ b/libs/ardour/session_process.cc
@@ -159,7 +159,10 @@ Session::process_routes (pframes_t nframes, bool& need_butler)
 	
 	if (_process_graph) {
 		DEBUG_TRACE(DEBUG::ProcessThreads,"calling graph/process-routes\n");
-		_process_graph->process_routes (nframes, start_frame, end_frame, declick, need_butler);
+		if (_process_graph->process_routes (nframes, start_frame, end_frame, declick, need_butler) < 0) {
+			stop_transport ();
+			return -1;
+		}
 	} else {
 
 		for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {