.

wcfs/wcfs.go

@@ -514,7 +514,7 @@ func (bfdata *BigFileData) Read(_ nodefs.File, dest []byte, off int64, fctx *fus
 	end := off + int64(len(dest))		// XXX overflow?
 	aoff := off - (off % zbf.blksize)
 	aend := end + (zbf.blksize - (end % zbf.blksize))
-	dest = make([]byte, aend - aoff)
+	dest = make([]byte, aend - aoff) // ~> [off:aend] in file
 
 	// read/load all block(s) in parallel
 	wg, ctx := errgroup.WithContext(ctx)
@@ -532,8 +532,7 @@ func (bfdata *BigFileData) Read(_ nodefs.File, dest []byte, off int64, fctx *fus
 		return nil, fuse.EIO
 	}
 
-
-	return fuse.ReadResultData(dest[off-aoff:end - (off-aoff)]), fuse.OK
+	return fuse.ReadResultData(dest[off-aoff:end-aoff]), fuse.OK
 }
 
 // readBlk serves Read to read 1 ZBlk #blk into destination buffer.