During May 2025, Tss worked on the rust-lang/gcc repository, focusing on stabilizing Rust integration within the GCC compiler. They addressed two internal compiler errors in the Rust frontend, one related to empty constexpr loops and another involving undefined attribute macros, by introducing targeted checks and conditional logic in C++ and Rust. To ensure long-term reliability, Tss expanded regression test coverage, enabling earlier detection of similar issues in future builds. Their work reduced CI failures and improved the robustness of Rust feature support in GCC. This effort demonstrated a strong grasp of compiler development, debugging, and automated testing practices.