Running into an infinite loop while using cin.eof()

I'm trying to read in multiple paragraphs from the input and storing them as a vector of strings. They are separated by empty strings. I wrote the code below but I keep running into a SIGPIPE error. Can anyone tell me why?

 getline(cin, num_stores);
 vector<string> test;

 while(cin.eof() == false){
        ostringstream ss;
        string line;

        while((getline(cin, line)) && (line.size() != 0)){
            ss << line << endl;
        }
        string paragraph = ss.str();
        test.push_back(paragraph);

        if(cin.eof() == true){
            break;
        }
    }