[rust-lang/rust] Breaking change in `std::os::windows::fs::OpenOptionsExt` affecting 1.94.0

### ROOT CAUSE The issue arises from a breaking change in the `std::os::windows::fs::OpenOptionsExt` trait in the Rust standard library. The trait, intended to extend `std::fs::OpenOptions` with Windows-specific methods, may have undergone changes (e.g., method renames or feature gate requirements) between Rust versions 1.90.0 and 1.94.0. The provided code attempts to implement this trait for a custom struct (`MyCustomOptions`), which is not the intended use case. Instead, the trait should be implemented for `std::fs::OpenOptions`. Additionally, the `windows` feature might need to be explicitly enabled for the code to work, as the trait is conditionally available. ### CODE FIX 1. **Use `std::fs::OpenOptions` directly** instead of implementing `OpenOptionsExt` for a custom struct. 2. **Enable the `windows` feature** in `Cargo.toml` if necessary to ensure the trait is available. Fixed code example: ```rust use std::fs::OpenOptions; use std::os::windows::fs::OpenOptionsExt; fn main() { let options = OpenOptions::new() .access_mode(0) // Use the trait method on std::fs::OpenOptions .share_mode(0); } ``` Ensure `Cargo.toml` includes: ```toml [features] default = [] windows = [] # Enable the windows feature if needed ``` This approach aligns with the intended use of `OpenOptionsExt` and addresses potential version-specific issues.