Worked on stabilizing the P4 compiler in the p4lang/p4c repository by addressing critical crash scenarios and enhancing error handling. Focused on backend development and compiler design using C++ and the P4 language, the work involved validating v1model versions to prevent invalid inputs, improving diagnostics for action invocations, and ensuring proper initialization during key simplification to avoid segmentation faults. Each change was delivered as a well-documented, targeted commit, prioritizing reliability and maintainability. The efforts contributed to more robust error messaging and input validation, directly supporting the project’s goals of increased reliability and improved developer productivity within the compiler codebase.