res.requestTooLarge()
	}
	l.err = &MaxBytesError{l.i}
	return n, l.err
}

func (l *maxBytesReader) Close() error {
	return l.r.Close()
}

func copyValues(dst, src url.Values) {
	for k, vs := range src {
		dst[k] = append(dst[k], vs...)
	}
}

func parsePostForm(r *Request) (vs url.Values, err error) {
	if r.Body == nil {

	offset := uint8(r >> h.B & (abi.MapBucketCount - 1))
	if h.B == 0 {
		copyValues(t, h, (*bmap)(h.buckets), s, offset)
		return
	}
	arraySize := int(bucketShift(h.B))
	buckets := h.buckets
	for i := 0; i < arraySize; i++ {
		bucket := (i + r) & (arraySize - 1)
		b := (*bmap)(add(buckets, uintptr(bucket)*uintptr(t.BucketSize)))
		copyValues(t, h, b, s, offset)
	}

	if h.growing() {