Branch cont_dev : test::test_rlp_slice::tests::test_rlp_slice_mock' panicked at 'attempt to subtract with overflow'

[dajuguan]

I was trying to run the test_rlp_slice_mock on the latest cont_dev branch. However, it throws the following error:

thread 'test::test_rlp_slice::tests::test_rlp_slice_mock' panicked at 'attempt to subtract with overflow', crates/zkwasm/src/circuits/utils/image_table.rs:43:22
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

My command is: cargo test test_rlp_slice_mock --features continuation -- --show-output