#vulnerable code 
                                @Test
    public void testDecodePadMarkerIndex3() {
        assertEquals("AA", new String(Base64.decodeBase64("QUE=".getBytes(Charsets.UTF_8))));
        assertEquals("AAA", new String(Base64.decodeBase64("QUFB".getBytes(Charsets.UTF_8))));
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void testDecodePadMarkerIndex3() {
        assertEquals("AA", new String(Base64.decodeBase64("QUE=".getBytes(CHARSET_UTF8))));
        assertEquals("AAA", new String(Base64.decodeBase64("QUFB".getBytes(CHARSET_UTF8))));
    }