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: QPDFAcroFormDocumentHelper::traverseField(
    QPDFObjectHandle field, QPDFObjectHandle parent, int depth,
    std::set<QPDFObjGen>& visited)
{
    if (depth > 100)
    {
        // Arbitrarily cut off recursion at a fixed depth to avoid
        // specially crafted files that could cause stack overflow.
        return;
    }
    if (! field.isIndirect())
    {
        QTC::TC("qpdf", "QPDFAcroFormDocumentHelper direct field");
        field.warnIfPossible(
            "encountered a direct object as a field or annotation while"
            " traversing /AcroForm; ignoring field or annotation");
        return;
    }
    if (! field.isDictionary())
    {
        QTC::TC("qpdf", "QPDFAcroFormDocumentHelper non-dictionary field");
        field.warnIfPossible(
            "encountered a non-dictionary as a field or annotation while"
            " traversing /AcroForm; ignoring field or annotation");
        return;
    }
    QPDFObjGen og(field.getObjGen());
    if (visited.count(og) != 0)
    {
        QTC::TC("qpdf", "QPDFAcroFormDocumentHelper loop");
        field.warnIfPossible("loop detected while traversing /AcroForm");
        return;
    }
    visited.insert(og);

    // A dictionary encountered while traversing the /AcroForm field
    // may be a form field, an annotation, or the merger of the two. A
    // field that has no fields below it is a terminal. If a terminal
    // field looks like an annotation, it is an annotation because
    // annotation dictionary fields can be merged with terminal field
    // dictionaries. Otherwise, the annotation fields might be there
    // to be inherited by annotations below it.

    bool is_annotation = false;
    bool is_field = (0 == depth);
    QPDFObjectHandle kids = field.getKey("/Kids");
    if (kids.isArray())
    {
        is_field = true;
        size_t nkids = kids.getArrayNItems();
        for (size_t k = 0; k < nkids; ++k)
        {
            traverseField(kids.getArrayItem(k), field, 1 + depth, visited);
        }
    }
    else
    {
        if (field.hasKey("/Parent"))
        {
            is_field = true;
        }
        if (field.hasKey("/Subtype") ||
            field.hasKey("/Rect") ||
            field.hasKey("/AP"))
        {
            is_annotation = true;
        }
    }

    QTC::TC("qpdf", "QPDFAcroFormDocumentHelper field found",
            (depth == 0) ? 0 : 1);
    QTC::TC("qpdf", "QPDFAcroFormDocumentHelper annotation found",
            (is_field ? 0 : 1));

    if (is_annotation)
    {
        QPDFObjectHandle our_field = (is_field ? field : parent);
        this->m->field_to_annotations[our_field.getObjGen()].push_back(
            QPDFAnnotationObjectHelper(field));
        this->m->annotation_to_field[og] =
            QPDFFormFieldObjectHelper(our_field);
    }
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-787'], 'message': 'Fix sign and conversion warnings (major)

This makes all integer type conversions that have potential data loss
explicit with calls that do range checks and raise an exception. After
this commit, qpdf builds with no warnings when -Wsign-conversion
-Wconversion is used with gcc or clang or when -W3 -Wd4800 is used
with MSVC. This significantly reduces the likelihood of potential
crashes from bogus integer values.

There are some parts of the code that take int when they should take
size_t or an offset. Such places would make qpdf not support files
with more than 2^31 of something that usually wouldn't be so large. In
the event that such a file shows up and is valid, at least qpdf would
raise an error in the right spot so the issue could be legitimately
addressed rather than failing in some weird way because of a silent
overflow condition.'