From 88b52579c0bb391fe0db225b7a608ad3ffd61831 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 19 Apr 2018 22:47:37 +0100
Subject: Add unit test to trigger #1275 and an assert to prevent the segfault.

---
 src/lib/writer.cc | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/lib')

diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index d6c3370b0..d86a2ccf4 100644
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -664,6 +664,8 @@ Writer::write (PlayerSubtitles subs, DCPTimePeriod period)
 		++_subtitle_reel;
 	}
 
+	DCPOMATIC_ASSERT (_subtitle_reel != _reels.end());
+
 	_subtitle_reel->write (subs);
 }
 
-- 
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