From 3c9b646e2ea130e9ab737bb3e751f1705fc7331c Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Wed, 13 Oct 2021 21:21:10 +0200
Subject: [PATCH 1/1] Add some asserts to check for negative trims.

---
 src/lib/content.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lib/content.cc b/src/lib/content.cc
index 49ab944be..b6f7ebbaa 100644
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -255,6 +255,8 @@ Content::set_position (shared_ptr<const Film> film, DCPTime p, bool force_emit)
 void
 Content::set_trim_start (ContentTime t)
 {
+	DCPOMATIC_ASSERT (t.get() >= 0);
+
 	/* video and audio content can modify its start trim */
 
 	if (video) {
@@ -278,6 +280,8 @@ Content::set_trim_start (ContentTime t)
 void
 Content::set_trim_end (ContentTime t)
 {
+	DCPOMATIC_ASSERT (t.get() >= 0);
+
 	ContentChangeSignaller cc (this, ContentProperty::TRIM_END);
 
 	{
-- 
2.30.2