fix an assert failure due to incorrect process locking when adding a send

[ardour.git] / libs / ardour / route.cc

diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 6a7ddde48b9e6324798515d486a865cc10260cb7..d5a36481e5eecc12faabe14fc10664fe8ebd84a8 100644 (file)
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -2551,6 +2551,7 @@ Route::add_internal_return ()
 void
 Route::add_send_to_internal_return (InternalSend* send)
 {
+       Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
        Glib::RWLock::ReaderLock rm (_processor_lock);
 
        for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {