我正在尝试索引只有一个 ID3 帧的 mp3 文件。使用 CLucene 和 TagLib。以下代码工作正常:
...
TagLib::MPEG::File file("/home/user/Depeche Mode - Personal Jesus.mp3");
if (file.ID3v2Tag()) {
    TagLib::ID3v2::FrameList frameList = file.ID3v2Tag()->frameList();
    lucene::document::Document *document = new lucene::document::Document;
    TagLib::ID3v2::FrameList::ConstIterator frame = frameList.begin();
    std::wstring field_name((*frame)->frameID().begin(), (*frame)->frameID().end());
    const wchar_t *fieldName = field_name.c_str();
    const wchar_t *fieldValue = (*frame)->toString().toWString().c_str();
    lucene::document::Field field(fieldName, fieldValue, true, true, true, false);
    document->add(field);
    writer->addDocument(document);
}
...
但这会使应用程序崩溃:
...
TagLib::MPEG::File file("/home/user/Depeche Mode - Personal Jesus.mp3");
if (file.ID3v2Tag()) {
    TagLib::ID3v2::FrameList frameList = file.ID3v2Tag()->frameList();
    lucene::document::Document *document = new lucene::document::Document;
    for (TagLib::ID3v2::FrameList::ConstIterator frame = frameList.begin(); frame != frameList.end(); frame++) {
            std::wstring field_name((*frame)->frameID().begin(), (*frame)->frameID().end());
            const wchar_t *fieldName = field_name.c_str();
            const wchar_t *fieldValue = (*frame)->toString().toWString().c_str();
            lucene::document::Field field(fieldName, fieldValue, true, true, true, false);
            document->add(field);
    }
    writer->addDocument(document);
}
...
这是为什么?!