Index out of bounds with 8 bit grayscale

[sdroege]

thread '<unnamed>' panicked at 'index out of bounds: the len is 5667 but the index is 5667', /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/golombcoder/bitreader.rs:26:29
stack backtrace:
   0: rust_begin_unwind
             at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:515:5
   1: core::panicking::panic_fmt
             at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/core/src/panicking.rs:92:14
   2: core::panicking::panic_bounds_check
             at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/core/src/panicking.rs:69:5
   3: ffv1::golombcoder::bitreader::BitReader::u
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/golombcoder/bitreader.rs:26:29
   4: ffv1::golombcoder::golomb::Coder::get_ur_golomb
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/golombcoder/golomb.rs:203:16
   5: ffv1::golombcoder::golomb::Coder::get_sr_golomb
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/golombcoder/golomb.rs:190:17
   6: ffv1::golombcoder::golomb::Coder::get_vlc_symbol
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/golombcoder/golomb.rs:158:21
   7: ffv1::golombcoder::golomb::Coder::sg
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/golombcoder/golomb.rs:142:13
   8: ffv1::decoder::Decoder::decode_line
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/decoder.rs:517:56
   9: ffv1::decoder::Decoder::decode_slice_content_yuv
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/decoder.rs:591:17
  10: ffv1::decoder::Decoder::decode_slice_content
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/decoder.rs:668:17
  11: ffv1::decoder::Decoder::decode_slice
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/decoder.rs:826:9
  12: ffv1::decoder::Decoder::decode_frame
             at /home/slomo/.cargo/git/checkouts/ffv1-08f2e3b26709fb34/2afb025/src/decoder.rs:245:23
  13: <gstffv1::ffv1dec::imp::Ffv1Dec as gstreamer_video::subclass::video_decoder::VideoDecoderImpl>::handle_frame
             at ./src/ffv1dec/imp.rs:432:29
  14: gstreamer_video::subclass::video_decoder::video_decoder_handle_frame::{{closure}}
             at /home/slomo/.cargo/git/checkouts/gstreamer-rs-79e52a2d27eb91a3/4b2f0a9/gstreamer-video/src/subclass/video_decoder.rs:713:9

See attached file: test.mkv.zip