From 26b44df454396b8f2e027d0617ad79a45e22db9c Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 3 Jul 2025 13:28:57 +0200
Subject: Failing test

---
 test/threed_test.cc | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/test/threed_test.cc b/test/threed_test.cc
index e2a27e8d5..467f82a46 100644
--- a/test/threed_test.cc
+++ b/test/threed_test.cc
@@ -353,3 +353,32 @@ BOOST_AUTO_TEST_CASE(threed_test_when_padding_needed)
 
 	make_and_verify_dcp(film);
 }
+
+
+/* #3056 was a crash with no video coming out of the player */
+BOOST_AUTO_TEST_CASE(threed_test_crash_with_only_one_eye)
+{
+	auto left = content_factory(TestPaths::private_data() / "arrietty_JP-EN.mkv")[0];
+	auto film = new_test_film("threed_test_crash_with_only_one_eye", { left });
+
+	film->set_three_d(true);
+	left->video->set_frame_type(VideoFrameType::THREE_D_LEFT);
+
+	Player player(film, Image::Alignment::COMPACT, false);
+	int const audio_channels = 2;
+	auto butler = std::make_shared<Butler>(
+		film, player, AudioMapping(), audio_channels, AV_PIX_FMT_RGB24, VideoRange::FULL, Image::Alignment::PADDED, true, false, Butler::Audio::ENABLED
+		);
+
+	int const audio_frames = 1920;
+	std::vector<float> audio(audio_frames * audio_channels);
+
+	butler->seek(dcpomatic::DCPTime(), true);
+	Butler::Error error;
+	for (auto i = 0; i < 960; ++i) {
+		butler->get_video(Butler::Behaviour::BLOCKING, &error);
+		butler->get_audio(Butler::Behaviour::BLOCKING, audio.data(), audio_frames);
+	}
+	BOOST_REQUIRE(error.code == Butler::Error::Code::NONE);
+}
+
-- 
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