Worked on stabilizing unit tests for the facebook/jemalloc repository by addressing a critical bug in the PSSet test suite. The solution involved migrating from stack-allocated arrays to heap-allocated memory using C, which resolved a recurring SIGSEGV when large PAGESIZE and hugepages were enabled. Careful attention was given to memory management, ensuring all allocations were properly freed to prevent leaks and improve test reliability. This debugging effort enhanced the consistency of the test suite and reduced flaky failures. The work demonstrated strong skills in C programming, memory management, and unit testing, focusing on robust and maintainable test infrastructure.