Worked on the openjdk/leyden repository to address a critical stability issue in the C2 JIT pipeline by fixing a potential segmentation fault in the VTransformReductionVectorNode tracing logic. Applied C++ development and debugging skills to introduce defensive null pointer checks, ensuring that pointers are validated before dereferencing during tracing operations. This targeted fix mitigated crash scenarios in production environments, enhancing the reliability of Leyden’s vector transformation tracing. The solution was peer-reviewed and documented, reflecting a careful approach to code safety and maintainability. The work demonstrated a strong focus on runtime stability, performance optimization, and collaborative code review practices.