Suppress piece read errors when data is obtained

diff --git a/reader.go b/reader.go
index 1b3815f3bdc6a77fa8330f09131131316eda3e11..72c94881e5659b9f91e6ff020bdb118efdff3b39 100644 (file)
--- a/reader.go
+++ b/reader.go
@@ -5,6 +5,8 @@ import (
        "io"
        "os"
        "sync"
+
+       "github.com/anacrolix/missinggo"
 )
 
 // Accesses torrent data via a client.
@@ -148,11 +150,10 @@ func (r *Reader) readOnceAt(b []byte, pos int64) (n int, err error) {
                pi := int(pos / r.t.Info().PieceLength)
                ip := r.t.Info().Piece(pi)
                po := pos % ip.Length()
-               if int64(len(b1)) > ip.Length()-po {
-                       b1 = b1[:ip.Length()-po]
-               }
+               missinggo.LimitLen(&b1, ip.Length()-po)
                n, err = r.t.torrent.readAt(b1, pos)
                if n != 0 {
+                       err = nil
                        return
                }
                // log.Printf("%s: error reading from torrent storage pos=%d: %s", r.t, pos, err)