From 33b03e1f8ed01d87565e93020c1cdd95f22eaa35 Mon Sep 17 00:00:00 2001
From: arvidn <arvid@libtorrent.org>
Date: Sun, 1 Oct 2017 05:15:27 +0200
Subject: [PATCH] improve handling of case where a torrent file has no files in
 it

---
 src/torrent_info.cpp                | 7 +++++++
 test/test_torrent_info.cpp          | 1 +
 test/test_torrents/no_files.torrent | 1 +
 3 files changed, 9 insertions(+)
 create mode 100644 test/test_torrents/no_files.torrent

diff --git a/src/torrent_info.cpp b/src/torrent_info.cpp
index d695a9a6c..c8fd9d5ad 100644
--- a/src/torrent_info.cpp
+++ b/src/torrent_info.cpp
@@ -1000,6 +1000,13 @@ namespace {
 			}
 			m_flags |= multifile;
 		}
+		if (files.num_files() == 0)
+		{
+			ec = errors::no_files_in_torrent;
+			// mark the torrent as invalid
+			m_files.set_piece_length(0);
+			return false;
+		}
 		TORRENT_ASSERT(!files.name().empty());
 
 		// extract SHA-1 hashes for all pieces
diff --git a/test/test_torrent_info.cpp b/test/test_torrent_info.cpp
index 9e2d861f4..8118ad793 100644
--- a/test/test_torrent_info.cpp
+++ b/test/test_torrent_info.cpp
@@ -155,6 +155,7 @@ test_failing_torrent_t test_error_torrents[] =
 	{ "invalid_file_size.torrent", errors::torrent_invalid_length },
 	{ "invalid_symlink.torrent", errors::torrent_invalid_name },
 	{ "many_pieces.torrent", errors::too_many_pieces_in_torrent },
+	{ "no_files.torrent", errors::no_files_in_torrent},
 };
 
 // TODO: test remap_files
diff --git a/test/test_torrents/no_files.torrent b/test/test_torrents/no_files.torrent
new file mode 100644
index 000000000..b27bab68d
--- /dev/null
+++ b/test/test_torrents/no_files.torrent
@@ -0,0 +1 @@
+d10:created by10:libtorrent13:creation datei1359599503e4:infod5:filesle4:name4:temp12:piece lengthi16384e6:pieces20:‚ž¼Œ&¾ÇJW›}ÜA4u,·¼‘‡ee