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: QPDF::resolveObjectsInStream(int obj_stream_number)
{
    // Force resolution of object stream
    QPDFObjectHandle obj_stream = getObjectByID(obj_stream_number, 0);
    if (! obj_stream.isStream())
    {
	throw QPDFExc(qpdf_e_damaged_pdf, this->m->file->getName(),
		      this->m->last_object_description,
		      this->m->file->getLastOffset(),
		      "supposed object stream " +
		      QUtil::int_to_string(obj_stream_number) +
		      " is not a stream");
    }

    // For linearization data in the object, use the data from the
    // object stream for the objects in the stream.
    QPDFObjGen stream_og(obj_stream_number, 0);
    qpdf_offset_t end_before_space =
        this->m->obj_cache[stream_og].end_before_space;
    qpdf_offset_t end_after_space =
        this->m->obj_cache[stream_og].end_after_space;

    QPDFObjectHandle dict = obj_stream.getDict();
    if (! (dict.getKey("/Type").isName() &&
	   dict.getKey("/Type").getName() == "/ObjStm"))
    {
	QTC::TC("qpdf", "QPDF ERR object stream with wrong type");
	throw QPDFExc(qpdf_e_damaged_pdf, this->m->file->getName(),
		      this->m->last_object_description,
		      this->m->file->getLastOffset(),
		      "supposed object stream " +
		      QUtil::int_to_string(obj_stream_number) +
		      " has wrong type");
    }

    if (! (dict.getKey("/N").isInteger() &&
	   dict.getKey("/First").isInteger()))
    {
	throw QPDFExc(qpdf_e_damaged_pdf, this->m->file->getName(),
		      this->m->last_object_description,
		      this->m->file->getLastOffset(),
		      "object stream " +
		      QUtil::int_to_string(obj_stream_number) +
		      " has incorrect keys");
    }

    int n = dict.getKey("/N").getIntValue();
    int first = dict.getKey("/First").getIntValue();

    std::map<int, int> offsets;

    PointerHolder<Buffer> bp = obj_stream.getStreamData(qpdf_dl_specialized);
    PointerHolder<InputSource> input = new BufferInputSource(
        this->m->file->getName() +
        " object stream " + QUtil::int_to_string(obj_stream_number),
	bp.getPointer());

    for (int i = 0; i < n; ++i)
    {
	QPDFTokenizer::Token tnum = readToken(input);
	QPDFTokenizer::Token toffset = readToken(input);
	if (! ((tnum.getType() == QPDFTokenizer::tt_integer) &&
	       (toffset.getType() == QPDFTokenizer::tt_integer)))
	{
	    throw QPDFExc(qpdf_e_damaged_pdf, input->getName(),
			  this->m->last_object_description,
                          input->getLastOffset(),
			  "expected integer in object stream header");
	}

	int num = QUtil::string_to_int(tnum.getValue().c_str());
	int offset = QUtil::string_to_ll(toffset.getValue().c_str());
	offsets[num] = offset + first;
    }

    // To avoid having to read the object stream multiple times, store
    // all objects that would be found here in the cache.  Remember
    // that some objects stored here might have been overridden by new
    // objects appended to the file, so it is necessary to recheck the
    // xref table and only cache what would actually be resolved here.
    for (std::map<int, int>::iterator iter = offsets.begin();
	 iter != offsets.end(); ++iter)
    {
	int obj = (*iter).first;
	QPDFObjGen og(obj, 0);
        QPDFXRefEntry const& entry = this->m->xref_table[og];
        if ((entry.getType() == 2) &&
            (entry.getObjStreamNumber() == obj_stream_number))
        {
            int offset = (*iter).second;
            input->seek(offset, SEEK_SET);
            QPDFObjectHandle oh = readObject(input, "", obj, 0, true);
            this->m->obj_cache[og] =
                ObjCache(QPDFObjectHandle::ObjAccessor::getObject(oh),
                         end_before_space, end_after_space);
        }
        else
        {
            QTC::TC("qpdf", "QPDF not caching overridden objstm object");
        }
    }
} ; 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.'