# note: An entropy image naming group 1 when only one group of codes
#   follows.
# expect: reject
# exercises: num_htree_groups is derived from the entropy image rather than
#   declared, so the decoder reads a second group out of a stream that
#   carries none and takes whatever the pixel data happens to say as a
#   Huffman code. It comes out empty, which BuildHuffmanTable() refuses -- a
#   clean failure on data that was never a code at all.
lossless
width 8
height 4
meta_bits 2
meta_tiles 0 1
group_count 1