Fixes #1515 and #1552.

webtorrent · DiegoRBaquero · Mar 11, 2019 · Mar 11, 2019 · Mar 11, 2019 · 88b4f5454329a8ad5dcad805fce1997d46b7637c
commit 88b4f5454329a8ad5dcad805fce1997d46b7637c
diff --git a/lib/file.js b/lib/file.js
@@ -43,7 +43,7 @@ class File extends EventEmitter {
 
     // Calculate first piece diffrently, it sometimes have a offset
     let downloaded = bitfield.get(start)
-      ? pieceLength - this.offset
+      ? pieceLength - (this.offset % pieceLength)
       : Math.max(piece.length - piece.missing - this.offset, 0)
 
     for (let index = start + 1; index <= end; ++index) {