MediaPlaylist decode custom tag panic

[panda1986]

func (p MediaPlaylist) decode(buf bytes.Buffer, strict bool) error { var eof bool var line string var err error

state := new(decodingState)
wv := new(WV)

for !eof {
    if line, err = buf.ReadString('\n'); err == io.EOF {
        eof = true
    } else if err != nil {
        break
    }

    err = decodeLineOfMediaPlaylist(p, wv, state, line, strict)
    if strict && err != nil {
        return err
    }

}
if state.tagWV {
    p.WV = wv
}
if strict && !state.m3u {
    return errors.New("#EXTM3U absent")
}
return nil

}

---

if p has customDecoder, directly decode, but state not initalized, when call decodeLineOfMediaPlaylist will panic