Thanks to [~rriggs] this very old mistake's been noticed:

     * <p> In every case, elements <code>b[0]</code> through
--> * <code>b[off]</code> and elements <code>b[off+len]</code> through
     * <code>b[b.length-1]</code> are unaffected.

It should've been:

java.io.InputStream#read(byte[], int, int)

     * <p> In every case, elements <code>b[0]</code> through
--> * <code>b[off-1]</code> and elements <code>b[off+len]</code> through
     * <code>b[b.length-1]</code> are unaffected.