Block state ids greater than 256 are converted to 256 in chunk sections that use the global palette #445

    #[test]
    fn fill_chunk_section_with_unique_states() {
        let mut section = ChunkSection::default();

        //maximum amount of blocks before the global palette is used
        let max_block_states = (1 << MAX_BITS_PER_BLOCK) - 1;

        //place unique block states
        for i in 0..max_block_states {
            section.set_block_at(0, 0, 0, BlockId::from_vanilla_id(i + 1)).unwrap()
        }

        //the chunk section should still use a local palette.
        assert!(section.blocks.palette().is_some());

        //the next block should cause this chunk to use the global palette

        let highest_block_state = BlockId::from_vanilla_id(257);
        section.set_block_at(0,0,0, highest_block_state);
        assert_eq!(section.block_at(0, 0,0).unwrap(), highest_block_state);
    }

Left:  BlockId { kind: NoteBlock, state: 6 }
Right: BlockId { kind: NoteBlock, state: 9 }

let index = p.index_or_insert(block);
self.resize_if_needed();
if self.palette.is_none() {
    block.vanilla_id() as usize
} else {
    index
}