on_chunk_data_biomes3d_bitmasks: index out of bounds: the len is 0 but the index is 0 (chunk_data.bitmasks.data[0] empty array)

[Dreamail]

[main.rs:254][INFO] Starting steven
[main.rs:346][INFO] Shader version: #version 150
[main.rs:99][INFO] Detected server protocol version 756
[server/mod.rs:1916][INFO] Received chat message: [GSit] 新版本可用: 1.0.5!
[server/mod.rs:1916][INFO] Received chat message: [GSit] 当前使用版本: 1.0.4!
[server/mod.rs:1916][INFO] Received chat message: [GSit] 下载最新版本:
[server/mod.rs:1916][INFO] Received chat message: [GSit] https://www.spigotmc.org/resources/62325
[server/mod.rs:1916][INFO] Received chat message: [Themis] You're running an outdated version of Themis, you should update as soon as possible!
[server/mod.rs:1916][INFO] Received chat message: An update for PlaceholderAPI (PlaceholderAPI v2.11.1)
[server/mod.rs:1916][INFO] Received chat message: is available at https://www.spigotmc.org/resources/placeholderapi.6245/
[server/mod.rs:1916][INFO] Received chat message: unhandled: multiplayer.player.joined
thread 'main' panicked at 'index out of bounds: the len is 0 but the index is 0', src/server/mod.rs:1957:17
stack backtrace:
0: _rust_begin_unwind
1: core::panicking::panic_fmt
2: core::panicking::panic_bounds_check
3: stevenarella::server::Server::entity_tick
4: stevenarella::server::Server::tick
5: stevenarella::tick_all
6: stevenarella::main2::{{closure}}
7: <winit::platform_impl::platform::app_state::EventLoopHandler as winit::platform_impl::platform::app_state::EventHandler>::handle_nonuser_event
8: winit::platform_impl::platform::app_state::Handler::handle_nonuser_event
9: winit::platform_impl::platform::app_state::AppState::cleared
10: winit::platform_impl::platform::observer::control_flow_end_handler
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21: winit::platform_impl::platform::event_loop::EventLoop::run
22: winit::event_loop::EventLoop::run
23: stevenarella::main
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.

[iceiix]

thread 'main' panicked at 'index out of bounds: the len is 0 but the index is 0', src/server/mod.rs:1957:17

If this was on build 9a8d357, from 1/17/2022, appears the crash is an OOB in reading chunk data:

    fn on_chunk_data_biomes3d_bitmasks(
        &mut self,
        chunk_data: packet::play::clientbound::ChunkData_Biomes3D_Bitmasks,
    ) {
        self.world
            .load_chunk117(
                chunk_data.chunk_x,
                chunk_data.chunk_z,
                true,
                chunk_data.bitmasks.data[0] as u64, // TODO: get all bitmasks  // <-- HERE
                16,                                 // TODO: get all bitmasks
                chunk_data.data.data,
            )
            .unwrap();
        self.load_block_entities(chunk_data.block_entities.data);
    }

so chunk_data.bitmasks.data is empty, but this case isn't handled. But if there is no data, is there any chunk to load? Are these "empty" chunks, should they be skipped?