Worked on the YosysHQ/yosys repository to enhance stability in arithmetic operations, focusing on a critical bug fix rather than new feature development. Addressed a crash in the unsigned division and modulo logic by ensuring the divisor is truncated to the logical width before zero-extension, which prevents failures when operands exceed their intended width. This targeted correction improved reliability in width-aware synthesis flows and reduced the risk of regressions. The work involved low-level programming and compiler development using C++, with a strong emphasis on bitwise operations to handle edge cases. The approach prioritized user trust and minimized future support needs.