diff --git a/libs/ardour/session_events.cc b/libs/ardour/session_events.cc
index 309c7f93e7..22deeedac7 100644
--- a/libs/ardour/session_events.cc
+++ b/libs/ardour/session_events.cc
@@ -67,7 +67,13 @@ SessionEvent::create_per_thread_pool (const std::string& name, uint32_t nitems)
 	   a CrossThreadPool for use by this thread whenever events are allocated/released
 	   from SessionEvent::pool()
 	*/
-	pool->create_per_thread_pool (name, sizeof (SessionEvent), nitems, [](size_t i, void*p) { std::cout << i << " " << *static_cast<SessionEvent*> (p) << "\n";});
+	pool->create_per_thread_pool (name, sizeof (SessionEvent), nitems,
+#ifndef NDEBUG
+			[](size_t i, void*p) { std::cout << i << " " << *static_cast<SessionEvent*> (p) << "\n"; }
+#else
+			NULL
+#endif
+			);
 }
 
 SessionEvent::SessionEvent (Type t, Action a, samplepos_t when, samplepos_t where, double spd, bool yn, bool yn2, bool yn3)
diff --git a/libs/pbd/pool.cc b/libs/pbd/pool.cc
index d14507d9e6..e1269c2359 100644
--- a/libs/pbd/pool.cc
+++ b/libs/pbd/pool.cc
@@ -86,13 +86,12 @@ Pool::alloc ()
 
 	if (free_list.read (&ptr, 1) < 1) {
 		PBD::stacktrace (std::cerr, 20);
-
 		if (_dump) {
+			printf ("RingBuffer write-idx: %u read-idx: %u\n", free_list.get_write_idx (), free_list.get_read_idx ());
 			void** _block = free_list.buffer ();
 			for (size_t i = 0; i < free_list.bufsize (); ++i) {
 				_dump (i, _block[i]);
 			}
-			printf ("RingBuffer write-idx: %u read-idx: %u\n", free_list.get_write_idx (), free_list.get_read_idx ());
 		}
 
 		fatal << "CRITICAL: " << _name << " POOL OUT OF MEMORY - RECOMPILE WITH LARGER SIZE!!" << endmsg;