Worked on enhancing the standalone WebAssembly runtime within the emscripten-core/emscripten repository, focusing on build system reliability and test coverage. Addressed a build-time defect by introducing a weak implementation of the __throw_exception_with_stack_trace symbol in the standalone runtime, ensuring that debug builds no longer reference an undefined function. Developed a regression test to confirm that standalone builds remain independent of this symbol, thereby preventing future regressions. Utilized C and Python to implement and validate the solution, integrating changes into the continuous integration workflow. The work emphasized robust testing and compatibility, contributing to more reliable standalone WASM builds and streamlined development processes.