From d33b0506a0f4cd61860fd54864267c82d3e171e3 Mon Sep 17 00:00:00 2001
From: Steven Siloti <ssiloti@gmail.com>
Date: Sun, 10 Feb 2019 11:01:48 -0800
Subject: [PATCH] don't try to hash empty read in do_uncached_hash

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

diff --git a/src/disk_io_thread.cpp b/src/disk_io_thread.cpp
index 3be0f0b34..32dfdd915 100644
--- a/src/disk_io_thread.cpp
+++ b/src/disk_io_thread.cpp
@@ -2132,7 +2132,7 @@ constexpr disk_job_flags_t disk_interface::cache_hit;
 
 			iov = iov.first(std::min(default_block_size, piece_size - offset));
 			ret = j->storage->readv(iov, j->piece, offset, file_flags, j->error);
-			if (ret < 0) break;
+			if (ret <= 0) break;
 			iov = iov.first(ret);
 
 			if (!j->error.ec)