Class stat

tests/repro/repro_parallel_determinism.c:141–141

 * (a C struct/function/macro sharing one name flipped label by merge order). */
TEST(repro_parallel_edge_determinism) {
    struct stat st;
    if (stat(RPD_CORPUS, &st) != 0 || !S_ISDIR(st.st_mode)) {
        SKIP("real-repo tier: corpus " RPD_CORPUS
             " absent (synthetic C could not trigger the parallel edge race — see header)");