Panic `index out of bounds: the len is 0 but the index is 0` in `core/engine/src/vm/opcode/define/mod.rs`

[qarmin]

Rust code

fn check_file(path: &str) {
    let Ok(file_content) = fs::read(path) else {
        return;
    };
    println!("Checking file: {path}");
    let mut context = Context::default();

    let _result = context.eval(Source::from_bytes(&file_content));
}

when evaluating javascript code(at the bottom should be attached raw, not formatted file - github removes some non-printable characters, so copying from here may not work):

class C{constructor(){class D{}}}new C

crashes with this info:

thread 'main' (431907) panicked at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/opcode/define/mod.rs:82:33:
index out of bounds: the len is 0 but the index is 0
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/07d246fc6dc227903da2955b38a59e060539a485/library/std/src/panicking.rs:698:5
   1: core::panicking::panic_fmt
             at /rustc/07d246fc6dc227903da2955b38a59e060539a485/library/core/src/panicking.rs:75:14
   2: core::panicking::panic_bounds_check
             at /rustc/07d246fc6dc227903da2955b38a59e060539a485/library/core/src/panicking.rs:271:5
   3: <usize as core::slice::index::SliceIndex<[T]>>::index_mut
             at /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/slice/index.rs:271:14
   4: core::slice::index::<impl core::ops::index::IndexMut<I> for [T]>::index_mut
             at /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/slice/index.rs:30:15
   5: <alloc::vec::Vec<T,A> as core::ops::index::IndexMut<I>>::index_mut
             at /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/vec/mod.rs:3629:9
   6: boa_engine::environments::runtime::declarative::PoisonableEnvironment::set
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/environments/runtime/declarative/mod.rs:310:35
   7: boa_engine::environments::runtime::declarative::DeclarativeEnvironmentKind::set
   8: boa_engine::environments::runtime::declarative::DeclarativeEnvironment::set
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/environments/runtime/declarative/mod.rs:80:19
   9: boa_engine::environments::runtime::EnvironmentStack::put_lexical_value
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/environments/runtime/mod.rs:280:13
  10: boa_engine::vm::opcode::define::PutLexicalValue::operation
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/opcode/define/mod.rs:82:33
  11: boa_engine::vm::opcode::handle_put_lexical_value
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/opcode/mod.rs:313:17
  12: boa_engine::vm::opcode::<impl boa_engine::context::Context>::execute_bytecode_instruction
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/opcode/mod.rs:464:9
  13: core::ops::function::FnOnce::call_once
             at /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:253:5
  14: boa_engine::vm::<impl boa_engine::context::Context>::execute_instruction
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/mod.rs:649:9
  15: boa_engine::vm::<impl boa_engine::context::Context>::execute_one
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/mod.rs:674:14
  16: boa_engine::vm::<impl boa_engine::context::Context>::run
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/vm/mod.rs:858:24
  17: boa_engine::script::Script::evaluate
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/script.rs:172:30
  18: boa_engine::context::Context::eval
             at /home/runner/.cargo/git/checkouts/boa-126d820dff07bf57/8ea37c6/core/engine/src/context/mod.rs:202:41
  19: boa::check_file
             at ./src/crates/boa/src/main.rs:33:27
  20: boa::main
             at ./src/crates/boa/src/main.rs:22:9
  21: core::ops::function::FnOnce::call_once
             at /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:253:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

compressed.zip