From 363f042b9520aa1edf4c013b97ba483f87bcc5cb Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Sun, 10 Jul 2016 23:00:52 +1000
Subject: [PATCH] Piece offset computed incorrectly in Reader.readOnceAt

Possibly it was only wrong on the last piece in rare circumstances.
---
 reader.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reader.go b/reader.go
index d1f9d2aa..b5eacf5b 100644
--- a/reader.go
+++ b/reader.go
@@ -170,7 +170,7 @@ func (r *Reader) readOnceAt(b []byte, pos int64, ctxErr *error) (n int, err erro
 		b1 := b[:avail]
 		pi := int(pos / r.t.Info().PieceLength)
 		ip := r.t.Info().Piece(pi)
-		po := pos % ip.Length()
+		po := pos % r.t.Info().PieceLength
 		missinggo.LimitLen(&b1, ip.Length()-po)
 		n, err = r.t.readAt(b1, pos)
 		if n != 0 {
-- 
2.48.1