From db3e87a7e4576cfa8e999adc26d956150e3d9fa9 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Sat, 10 Dec 2022 14:14:12 -0700
Subject: [PATCH] do nothing gracefully if asked to remove only tempo

---
 libs/temporal/tempo.cc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/libs/temporal/tempo.cc b/libs/temporal/tempo.cc
index 095da87e36..1e00a269cf 100644
--- a/libs/temporal/tempo.cc
+++ b/libs/temporal/tempo.cc
@@ -990,11 +990,13 @@ TempoMap::add_tempo (TempoPoint * tp)
 void
 TempoMap::remove_tempo (TempoPoint const & tp)
 {
+	if (_tempos.size() < 2) {
+		return;
+	}
+
 	superclock_t sc (tp.sclock());
 	Tempos::iterator t;
 
-	assert (_tempos.size() > 1);
-
 	/* the argument is likely to be a Point-derived object that doesn't
 	 * actually exist in this TempoMap, since the caller called
 	 * TempoMap::write_copy() in order to perform an RCU operation, but
@@ -1621,6 +1623,10 @@ TempoMap::set_meter (Meter const & t, BBT_Time const & bbt)
 void
 TempoMap::remove_meter (MeterPoint const & mp)
 {
+	if (_meters.size() < 2) {
+		return;
+	}
+
 	superclock_t sc = mp.sclock();
 	Meters::iterator m;