SIGSEGV和SIGABRT在C ++中没有明显的原因

Question

我正在尝试使用此代码从套接字读取完整的消息：

int readWholeMessage(char* &message){
    bool ended=false;
    bool first=true;
    int mlen=0;
    int len = BUFFLEN;
    char* buffer;
    char* sol=new char[BUFFLEN];
    while(!ended) {
        buffer = new char[BUFFLEN];
        n = (int) read(s, buffer, (size_t) BUFFLEN);
        if (n < 0) {
            perror("ERROR reading from socket");
            close(s);
            return 1;
        }
        else{
            //looks for the end of the message: "\r\n"          
            for(int i=0; i<BUFFLEN-1; i++){
                mlen++;
                if(buffer[i]=='\r' && buffer[i+1]=='\n'){
                    ended=true;
                    break;
                }
            }
            mlen++;
            //saves the result in sol and deletes buffer
            if(first){
                strcpy(sol, buffer);
                first=false;
            }
            //creates a new bigger array, saves the whole message,
            //deletes de old array points the pointer sol to the new one
            else {
                len+=BUFFLEN;
                char *bufferAux = new char[len+1];
                strcpy(bufferAux, sol);
                strcat(bufferAux,buffer);
                delete [] sol;
                sol=bufferAux;
            }
            delete [] buffer;
        }
    }
    message = new char[mlen+1];
    strncpy(message, sol, (size_t) mlen);
    message[mlen]= '\0';
    delete[](sol);
    return 0;
}

但是SIGSEGV和SIGABRT在delete [] sol中随机出现;并删除[]缓冲区;取决于要阅读的消息的长度。 如果BUFFSIZE为8，则添加1可解决问题，但我需要它为256。 有些帮忙吗？