amend prev commit

[ardour.git] / libs / pbd / pbd / abstract_ui.cc

diff --git a/libs/pbd/pbd/abstract_ui.cc b/libs/pbd/pbd/abstract_ui.cc
index ed358cb7cfba6f0245941ba710051937771e4cb9..152023f1d4dd31eafef1eaff038a793094bde5f3 100644 (file)
--- a/libs/pbd/pbd/abstract_ui.cc
+++ b/libs/pbd/pbd/abstract_ui.cc
@@ -307,8 +307,10 @@ AbstractUI<RequestObject>::handle_ui_requests ()
 
                if (req->invalidation) {
                        DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("%1/%2 remove request from its invalidation list\n", event_loop_name(), pthread_name()));
-                       assert (req->invalidation->event_loop && req->invalidation->event_loop != this);
-                       Glib::Threads::Mutex::Lock lm (req->invalidation->event_loop->request_invalidation_mutex());
+                       Glib::Threads::Mutex::Lock lm (req->invalidation->event_loop->request_invalidation_mutex(), Glib::Threads::NOT_LOCK);
+                       if (req->invalidation->event_loop && req->invalidation->event_loop != this) {
+                               lm.acquire ();
+                       }
 
                        /* after this call, if the object referenced by the
                         * invalidation record is deleted, it will no longer