From 5ab015769496827ea0bc0b22d1ac0b1e6afe386b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Sch=C3=BCrmann?= <daschuer@mixxx.org>
Date: Wed, 13 Oct 2021 02:41:35 +0200
Subject: [PATCH] Fix debug assertion when the only playing track has no beats

---
 src/engine/sync/enginesync.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/engine/sync/enginesync.cpp b/src/engine/sync/enginesync.cpp
index 4221469f825..f8c564da523 100644
--- a/src/engine/sync/enginesync.cpp
+++ b/src/engine/sync/enginesync.cpp
@@ -657,6 +657,10 @@ void EngineSync::reinitLeaderParams(Syncable* pSource) {
     mixxx::Bpm bpm = pSource->getBpm();
     if (!bpm.isValid()) {
         bpm = baseBpm;
+        if (!bpm.isValid()) {
+            // This happens if the deck is the only playing one but the track has no beats
+            return;
+        }
     }
     if (kLogger.traceEnabled()) {
         kLogger.trace() << "BaseSyncableListener::reinitLeaderParams, source is"