From 2791e8d738b60eada443b5e468227bffaf914574 Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Thu, 8 Apr 2021 10:45:01 +1000
Subject: [PATCH] timeline: null check when updating timebase

Fixes crash on close
---
 app/widget/timelinewidget/timelinewidget.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/widget/timelinewidget/timelinewidget.cpp b/app/widget/timelinewidget/timelinewidget.cpp
index 6a3292249..40d8a4b06 100644
--- a/app/widget/timelinewidget/timelinewidget.cpp
+++ b/app/widget/timelinewidget/timelinewidget.cpp
@@ -169,6 +169,8 @@ TimelineWidget::TimelineWidget(QWidget *parent) :
 TimelineWidget::~TimelineWidget()
 {
   // Ensure no blocks are selected before any child widgets are destroyed (prevents corrupt ViewSelectionChanged() signal)
+  ConnectViewerNode(nullptr);
+
   Clear();
 
   qDeleteAll(tools_);
@@ -1061,7 +1063,7 @@ void TimelineWidget::UpdateViewTimebases()
   for (int i=0;i<views_.size();i++) {
     TimelineAndTrackView* view = views_.at(i);
 
-    if (use_audio_time_units_ && i == Track::kAudio) {
+    if (GetConnectedNode() && use_audio_time_units_ && i == Track::kAudio) {
       view->view()->SetTimebase(GetConnectedNode()->GetAudioParams().sample_rate_as_time_base());
     } else {
       view->view()->SetTimebase(timebase());