# note: An alpha plane whose green code is over-subscribed.
# expect: reject
# exercises: A malformed Huffman code inside the alpha stream rather than
#   inside a VP8L image. It fails in the same BuildHuffmanTable() as
#   codelen-oversubscribed, but the error has to travel back out through
#   VP8LDecodeAlphaHeader() and ALPHInit() to become the decoder's verdict.
chunks VP8X ALPH VP8
alpha 1
width 16
height 16
yac_qi 30
macroblock
coeffs y2 -20
alph_plane
code green lengths 1 1 1
pixels 0 1 2 x254