Does not support 1.17 maps with custom height range 'index out of bounds' if min_y is less than -64

[lizelive]

The real MIN_Y is -2048 and MAX_Y 2016.

thread 'main' panicked at 'index out of bounds: the len is 24 but the index is 18446744073709551538', /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/section_tower.rs:47:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Any worlds created with this datapack that will allow you to reproduce. deeper_world.zip

thread 'main' panicked at 'index out of bounds: the len is 24 but the index is 18446744073709551538', /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/section_tower.rs:47:13
stack backtrace:
   0: rust_begin_unwind
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/panicking.rs:92:14
   2: core::panicking::panic_bounds_check
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/panicking.rs:69:5
   3: <fastanvil::java::section_tower::SectionTower as serde::de::Deserialize>::deserialize
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/section_tower.rs:47:13
   4: <serde::de::impls::OptionVisitor<T> as serde::de::Visitor>::visit_some
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/de/impls.rs:683:9
   5: <&mut fastnbt::de::Deserializer as serde::de::Deserializer>::deserialize_option
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:716:9
   6: serde::de::impls::<impl serde::de::Deserialize for core::option::Option<T>>::deserialize
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/de/impls.rs:703:9
   7: <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/de/mod.rs:785:9
   8: <fastnbt::de::CompoundAccess as serde::de::MapAccess>::next_value_seed
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:873:9
   9: serde::de::MapAccess::next_value
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/de/mod.rs:1846:9
  10: <fastanvil::java::_::<impl serde::de::Deserialize for fastanvil::java::Level>::deserialize::__Visitor as serde::de::Visitor>::visit_map
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/mod.rs:109:10
  11: fastnbt::de::consume_value
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:358:13
  12: <&mut fastnbt::de::Deserializer as serde::de::Deserializer>::deserialize_any
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:587:9
  13: <&mut fastnbt::de::Deserializer as serde::de::Deserializer>::deserialize_struct
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/macros.rs:134:13
  14: fastanvil::java::_::<impl serde::de::Deserialize for fastanvil::java::Level>::deserialize
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/mod.rs:109:10
  15: <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/de/mod.rs:785:9
  16: <fastnbt::de::CompoundAccess as serde::de::MapAccess>::next_value_seed
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:873:9
  17: serde::de::MapAccess::next_value
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/de/mod.rs:1846:9
  18: <fastanvil::java::_::<impl serde::de::Deserialize for fastanvil::java::JavaChunk>::deserialize::__Visitor as serde::de::Visitor>::visit_map
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/mod.rs:36:10
  19: <&mut fastnbt::de::Deserializer as serde::de::Deserializer>::deserialize_any
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:554:24
  20: <&mut fastnbt::de::Deserializer as serde::de::Deserializer>::deserialize_struct
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.126/src/macros.rs:134:13
  21: fastanvil::java::_::<impl serde::de::Deserialize for fastanvil::java::JavaChunk>::deserialize
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastanvil-0.20.0/src/java/mod.rs:36:10
  22: fastnbt::de::from_bytes
             at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/fastnbt-1.1.0/src/de.rs:277:13
  23: converter::main
             at ./src/main.rs:15:28
  24: core::ops::function::FnOnce::call_once
             at /usr/local/rustup/toolchains/1.53.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[owengage]

I've been wanting to look into this custom heights from 1.17. I shall investigate, thanks.

[owengage]

Should be fixed in fastanvil 0.21. :)

I tested it with a deep world and it seems to work. https://owengage.com/anvil/ should be updated with the new version.

If it still doesn't work let me know!