From 0f6ec06e126371ae02c1af201a5d892c7c59d831 Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Tue, 30 Sep 2008 01:16:19 +0000
Subject: [PATCH] fixed race condition in invariant check in disk io thread
 (only affected debug builds)

---
 src/disk_io_thread.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index 901834634..31c60171f 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -636,10 +636,11 @@ namespace libtorrent
 		TORRENT_ASSERT(j.buffer_size <= m_block_size);
 		mutex_t::scoped_lock l(m_queue_mutex);
 #ifndef NDEBUG
+		mutex_t::scoped_lock l2(m_piece_mutex);
 		if (j.action == disk_io_job::write)
 		{
 			cache_t::iterator p
-				= find_cached_piece(m_pieces, j, l);
+				= find_cached_piece(m_pieces, j, l2);
 			if (p != m_pieces.end())
 			{
 				int block = j.offset / m_block_size;