Given the following code containing errors, provide Common Weakness Enumeration (CWE) identifiers and corresponding messages in JSON format. Each identified weakness should have a unique entry in the JSON array.
    Code: int regcomp(regex_t *preg, const char *pattern, int cflags)
{
    conopt_t globopts;
    globopts.nested_negative_tags = !(cflags & (REG_NFA | REG_REGLESS));
    globopts.FFlag = true;
    globopts.backward = cflags & REG_BACKWARD;
    globopts.stadfa = cflags & REG_STADFA;
    Msg msg;
    Opt opts(globopts, msg);
    opts.set_subhistories((cflags & REG_SUBHIST) != 0);
    opts.set_autotags((cflags & REG_AUTOTAGS) != 0);
    opts.set_posix_syntax(true);
    opts.set_posix_semantics((cflags & REG_LEFTMOST) == 0);
    const opt_t *opt = opts.snapshot();
    preg->flags = cflags;

    const AST *a = parse(pattern);

    preg->rmgr = new RangeMgr;

    ASTRule ar(a, new SemAct(NOWHERE));
    std::vector<ASTRule> arv;
    arv.push_back(ar);
    RESpec re(arv, opt, msg, *preg->rmgr);

    find_fixed_tags(re);

    insert_default_tags(re);

    nfa_t *nfa = new nfa_t(re);

    nfa_t *nfa0 = NULL;
    if (cflags & REG_BACKWARD) {
        conopt_t globopts0;
        globopts0.FFlag = true;
        Opt opts0(globopts0, msg);
        const opt_t *opt0 = opts0.snapshot();
        RESpec re0(arv, opt0, msg, *preg->rmgr);
        nfa0 = new nfa_t(re0);
        delete opt0;
    }

    dfa_t *dfa = NULL;
    rldfa_t *rldfa = NULL;

    if (cflags & REG_NFA) {
        if ((cflags & REG_TRIE) && (cflags & REG_LEFTMOST)) {
            preg->simctx = new lzsimctx_t(*nfa, nfa0, preg->re_nsub, cflags);
        } else if (cflags & REG_TRIE) {
            preg->simctx = new pzsimctx_t(*nfa, nfa0, preg->re_nsub, cflags);
        } else if (cflags & REG_LEFTMOST) {
            preg->simctx = new lsimctx_t(*nfa, nfa0, preg->re_nsub, cflags);
        } else if (cflags & REG_KUKLEWICZ) {
            preg->simctx = new ksimctx_t(*nfa, nfa0, preg->re_nsub, cflags);
        } else {
            preg->simctx = new psimctx_t(*nfa, nfa0, preg->re_nsub, cflags);
        }
    } else {
        preg->char2class = new size_t[256];
        split_charset(re);
        for (uint32_t i = 1, j = 0; i < re.charset.size(); ++i) {
            for (; j < re.charset[i]; ++j) {
                preg->char2class[j] = i - 1;
            }
        }

        dfa = new dfa_t(*nfa, Rule::NONE, Rule::NONE);
        if (cflags & REG_REGLESS) {
            DASSERT((cflags & REG_STADFA) == 0);
            rldfa = new rldfa_t(*nfa, *dfa, opt, cflags);
            opt = NULL; // transfer options ownership to RLDFA
        } else {
            determinization(*nfa, *dfa, opt, msg, "");
            cutoff_dead_rules(*dfa, opt, "", msg);
            insert_fallback_tags(opt, *dfa);
            compact_and_optimize_tags(opt, *dfa);
        }

        if (cflags & REG_TSTRING) {
            // T-string does not need intermediate storage for tag values.
        } else if (cflags & REG_SUBHIST) {
            const size_t nlists = (cflags & REG_REGLESS)
                ? dfa->tags.size() : static_cast<size_t>(dfa->maxtagver + 1);
            preg->regtrie = new regoff_trie_t(nlists);
        } else {
            preg->regs = new regoff_t[dfa->maxtagver + 1];
        }
    }

    preg->nfa = nfa;
    preg->dfa = dfa;
    preg->rldfa = rldfa;

    DASSERT(nfa->rules.size() == 1);
    preg->re_nsub = nfa->rules[0].ncap + 1;
    preg->re_ntag = nfa->tags.size();

    if (cflags & REG_TSTRING) {
        // T-string is stored in RE (reallocated on each regtstring() call if
        // needed), and the user gets an immutable view of it (const ref).
        tstring_t &ts = preg->tstring;
        ts.capacity = 256;
        ts.string = new tchar_t[ts.capacity];
        ts.length = 0;
    } else if (cflags & REG_SUBHIST) {
        // Allocated on every call to regparse() and returned to the user.
    } else {
        // Allocated by the user.
    }

    delete opt;
    return 0;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-787'], 'message': 'Limit maximum allowed NFA and DFA size.

Instead of failing with an out of memory exception or crashing with a
stack overflow, emit an error message and exit. This is a partial fix
for bug #394 "Stack overflow due to recursion in src/dfa/dead_rules.cc",
where re2c hit stack overflow on a counted repetition regexp with high
upper bound.

The patch adds the following limits:
  1. the number of NFA states
  2. NFA depth (maximum length of a non-looping path from start to end)
  3. the number of DFA states
  3. total DFA size (sum total of all NFA substates in all DFA states)

There are tests for the first three limits, but not for the DFA size as
all examples that trigger this behavior take a long time to finish (a
few seconds), which increases test run time almost twice.'