During March 2025, Daxia Liu focused on resolving a critical build issue in the facebook/folly repository, specifically targeting the folly.symbolizer component. By analyzing the build system and debugging C++ code, Daxia identified that an ambiguous operator overload in IOBuf.cpp was causing failures. To address this, Daxia replaced the DCHECK_NE(current->data(), nullptr) assertion with DCHECK_NOTNULL(current->data()), ensuring proper non-null pointer validation and restoring build stability. Although no new features were released during this period, Daxia’s work demonstrated a strong command of C++ and debugging practices, contributing to the reliability and maintainability of the codebase.