Function extract_crashes

tests/test_lang_contract.c:227–253

Run cbm_extract_file in a forked child; return true if the child died from a * signal (SIGBUS/SIGSEGV/...). ASan does not install a SIGBUS handler, so an * in-process crash would terminate the whole test runner — forking isolates it * and lets us assert "extraction must not crash" deterministically. * * Windows (msys2) has no fork()/waitpid(): run in-process. A genuine crash there * aborts t

 * aborts the runner (a hard, visible failure), and the fork-isolated check still
 * runs on the POSIX CI legs, so coverage is preserved. */
static bool extract_crashes(const char *content, CBMLanguage lang, const char *relpath) {
#if defined(_WIN32)
    CBMFileResult *r =
        cbm_extract_file(content, (int)strlen(content), lang, "lc", relpath, 0, NULL, NULL);
    if (r) {
        cbm_free_result(r);
    }
    return false;
#else
    fflush(NULL);
    pid_t pid = fork();
    if (pid < 0) {
        return false; /* cannot fork — do not flag a crash we can't observe */
    }
    if (pid == 0) {
        CBMFileResult *r =
            cbm_extract_file(content, (int)strlen(content), lang, "lc", relpath, 0, NULL, NULL);
        if (r) {
            cbm_free_result(r);
        }
        _exit(0);
    }
    int status = 0;
    (void)waitpid(pid, &status, 0);
    return WIFSIGNALED(status);
#endif
}

/* ══════════════════════════════════════════════════════════════════
 *  KNOWN-BUG CONTRACTS (must FAIL until fixed) — see P2