GeezerVison

fn hash_wrapper(zelf: &PyObject, vm: &VirtualMachine) -> PyResult<PyHash> {
    let hash_obj = vm.call_special_method(zelf, identifier!(vm, __hash__), ())?;
    let py_int = hash_obj
        .downcast_ref::<PyInt>()
        .ok_or_else(|| vm.new_type_error("__hash__ method should return an integer"))?;
    let big_int = py_int.as_bigint();
    let hash: PyHash = big_int
        .to_i64()
        .unwrap_or_else(|| (big_int % BigInt::from(u64::MAX)).to_i64().unwrap()); // Bug: u64::MAX should be i64::Max
    Ok(hash)
}

thread 'main' panicked at crates/vm/src/types/slot.rs:369:72:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/11ad40bb839ca16f74784b4ab72596ad85587298/library/std/src/panicking.rs:697:5
   1: core::panicking::panic_fmt
             at /rustc/11ad40bb839ca16f74784b4ab72596ad85587298/library/core/src/panicking.rs:75:14
   2: core::panicking::panic
             at /rustc/11ad40bb839ca16f74784b4ab72596ad85587298/library/core/src/panicking.rs:145:5
   3: core::option::unwrap_failed
             at /rustc/11ad40bb839ca16f74784b4ab72596ad85587298/library/core/src/option.rs:2072:5
   4: core::option::Option<T>::unwrap
             at /home/jackfromeast/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:1005:21
   5: rustpython_vm::types::slot::hash_wrapper::{{closure}}
             at ./crates/vm/src/types/slot.rs:369:72
   6: core::option::Option<T>::unwrap_or_else
             at /home/jackfromeast/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:1050:21
   7: rustpython_vm::types::slot::hash_wrapper
             at ./crates/vm/src/types/slot.rs:369:10
   8: rustpython_vm::protocol::object::<impl rustpython_vm::object::core::PyObject>::hash
             at ./crates/vm/src/protocol/object.rs:663:20
   9: rustpython_vm::stdlib::builtins::builtins::hash
             at ./crates/vm/src/stdlib/builtins.rs:440:13
  10: core::ops::function::Fn::call
             at /home/jackfromeast/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:79:5
  11: rustpython_vm::function::builtin::<impl rustpython_vm::function::builtin::sealed::PyNativeFnInternal<(rustpython_vm::function::builtin::OwnedParam<T1>,),R,rustpython_vm::vm::VirtualMachine> for F>::call_
             at ./crates/vm/src/function/builtin.rs:126:17
  12: <F as rustpython_vm::function::builtin::IntoPyNativeFn<(T,R,VM)>>::call
             at ./crates/vm/src/function/builtin.rs:92:14
  13: rustpython_vm::function::builtin::into_func::{{closure}}
             at ./crates/vm/src/function/builtin.rs:50:40
  14: <rustpython_vm::builtins::builtin_func::PyNativeFunction as rustpython_vm::types::slot::Callable>::call
             at ./crates/vm/src/builtins/builtin_func.rs:73:9
  15: rustpython_vm::types::slot::Callable::slot_call
             at ./crates/vm/src/types/slot.rs:1028:9
  16: rustpython_vm::protocol::callable::PyCallable::invoke
             at ./crates/vm/src/protocol/callable.rs:52:22
  17: rustpython_vm::protocol::callable::<impl rustpython_vm::object::core::PyObject>::call_with_args
             at ./crates/vm/src/protocol/callable.rs:33:18
  18: rustpython_vm::protocol::callable::<impl rustpython_vm::object::core::PyObject>::call
             at ./crates/vm/src/protocol/callable.rs:22:14
  19: rustpython_vm::frame::ExecutingFrame::execute_call
             at ./crates/vm/src/frame.rs:1880:30
  20: rustpython_vm::frame::ExecutingFrame::execute_instruction
             at ./crates/vm/src/frame.rs:667:22
  21: rustpython_vm::frame::ExecutingFrame::run
             at ./crates/vm/src/frame.rs:372:31
  22: rustpython_vm::frame::<impl rustpython_vm::object::core::Py<rustpython_vm::frame::Frame>>::run::{{closure}}
             at ./crates/vm/src/frame.r...

</details>



<!-- START COPILOT CODING AGENT SUFFIX -->

- Fixes RustPython/RustPython#6550

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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Tests**
  * Added comprehensive test cases for hash function behavior, validating edge cases and handling of built-in types.

* **Refactor**
  * Optimized internal hash computation logic.

<sub>✏️ Tip: You can customize this high-level summary in your review settings.</sub>

<!-- end of auto-generated comment: release notes by coderabbit.ai -->