From f2e16c36b33fbf11f1cc47bce89de720a242233e Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Thu, 12 Sep 2013 07:10:52 +0000
Subject: [PATCH] merged fix from RC_0_16

---
 ChangeLog              |  1 +
 src/disk_io_thread.cpp | 15 ++++++++++-----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 67e33b674..f00f1a55d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -24,6 +24,7 @@
 	* fix uTP edge case where udp socket buffer fills up
 	* fix nagle implementation in uTP
 
+	* improve error message for 'file too short'
 	* fix piece-picker stat bug when only selecting some files for download
 	* fix bug in async_add_torrent when settings file_priorities
 	* fix boost-1.42 support for python bindings
diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index 29fe323b4..330a5e7e2 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -824,8 +824,9 @@ namespace libtorrent
 			if (ret != buffer_size)
 			{
 				// this means the file wasn't big enough for this read
-				p.storage->get_storage_impl()->set_error(""
-					, errors::file_too_short);
+				char msg[70];
+				snprintf(msg, sizeof(msg), "reading p: %d b: %d s: %d (read: %d)", p.piece, start_block, buffer_size, ret);
+				p.storage->get_storage_impl()->set_error(msg, errors::file_too_short);
 				free_piece(p, l);
 				return -1;
 			}
@@ -855,8 +856,9 @@ namespace libtorrent
 			if (ret != buffer_size)
 			{
 				// this means the file wasn't big enough for this read
-				p.storage->get_storage_impl()->set_error(""
-					, errors::file_too_short);
+				char msg[70];
+				snprintf(msg, sizeof(msg), "reading p: %d b: %d s: %d (read: %d)", p.piece, start_block, buffer_size, ret);
+				p.storage->get_storage_impl()->set_error(msg, errors::file_too_short);
 				free_piece(p, l);
 				return -1;
 			}
@@ -2032,10 +2034,13 @@ namespace libtorrent
 						}
 						if (ret != j.buffer_size)
 						{
+							char msg[70];
+							snprintf(msg, sizeof(msg), "reading p: %d o: %d s: %d (read: %d)", j.piece, j.offset, j.buffer_size, ret);
+
 							// this means the file wasn't big enough for this read
 							j.buffer = 0;
 							j.error = errors::file_too_short;
-							j.error_file.clear();
+							j.error_file = msg;
 							j.str.clear();
 							ret = -1;
 							break;