From d04d16545105ac70403348c1e4db020f0788d152 Mon Sep 17 00:00:00 2001
From: Thomas Wilshaw <thomaswilshaw@gmail.com>
Date: Thu, 21 Oct 2021 23:00:34 +0100
Subject: [PATCH] Add safety checks to DeslectAllMarkers()

---
 app/widget/timeruler/seekablewidget.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/widget/timeruler/seekablewidget.cpp b/app/widget/timeruler/seekablewidget.cpp
index 3602c4d50..b62d60414 100644
--- a/app/widget/timeruler/seekablewidget.cpp
+++ b/app/widget/timeruler/seekablewidget.cpp
@@ -194,6 +194,12 @@ QVector<TimelineMarker *> SeekableWidget::GetActiveTimelineMarkers() {
 
 void SeekableWidget::DeselectAllMarkers()
 {
+  if (timebase().isNull()) {
+    return;
+  }
+  if (!timeline_points()) {
+    return;
+  }
   foreach(TimelineMarker* marker, timeline_points()->markers()->list()) {
       marker->set_active(false);
   }