f.err = CorruptInputError(f.roffset)
				return 0, f.err
			}
			f.b = b >> (n & 31)
			f.nb = nb - n
			return int(chunk >> huffmanValueShift), nil
		}
	}
}

func (f *decompressor) makeReader(r io.Reader) {
	if rr, ok := r.(Reader); ok {
		f.rBuf = nil
		f.r = rr
		return
	}
	// Reuse rBuf if possible. Invariant: rBuf is always created (and owned) by decompressor.
	if f.rBuf != nil {