小程序中的g++内部编译器错误

Question

我正在编写一个小程序来解决Project 问题21，当我遇到一个无法解释的内部编译器错误时，我正在测试我的代码的早期部分。我希望有任何关于如何重写我的程序以避免这种错误的提示。

下面是构建命令和编译器选项：

g++ -std=c++11 -O2 -Wall -o "pe_021" "pe_021.cc"

以下是我得到的错误：

Internal compiler error: Error reporting routines re-entered.  
Compilation failed.

这是我的密码：

#include <array>
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

const unsigned int N = 10000; //look for amicable numbers smaller than N
vector<unsigned int> list_of_primes;

vector<unsigned int[2]> prime_factorize(unsigned int);

int main(int argc, char **argv)
{
    //import a list of primes
    ifstream ifs ("primes_10000.txt");
    for (unsigned int index = 0; index < N; index++) {
        string prime_number;
        getline(ifs, prime_number);
        list_of_primes.push_back(stoi(prime_number));
    }
    ifs.close();

    //test prime factorization function by prime factorizing 12
    vector<unsigned int[2]> prime_factorization = prime_factorize(12);
    for(unsigned int (&prime_and_exponent)[2] : prime_factorization) {
        cout << prime_and_exponent[0] << ", " << prime_and_exponent[1] << endl;
    }

    return 0;
}

vector<unsigned int[2]> prime_factorize(unsigned int number)
{
    vector<unsigned int[2]> prime_factorization;
    for(unsigned int index = 1; index < list_of_primes.size(); index++) {
        if(number % list_of_primes[index] == 0) {
            unsigned int prime_and_exponent[2] = {list_of_primes[index], 1};
            prime_factorization.push_back(prime_and_exponent);
            number /= list_of_primes[index];

            while(number % list_of_primes[index] == 0) {
                prime_factorization.back()[1]++;
                number /= list_of_primes[index];
            }
        }
        if(number == 1) {
            break;
        }
    }
    return prime_factorization;
}

Answer 1

这个错误是由行引起的。

  prime_factorization.push_back(prime_and_exponent);

似乎把数组放入向量会导致崩溃，至少在GCC 4.7.3中是这样。首先，发送错误报告给GCC的开发人员。第二，将您的unsigned int[2]打包到类中，我认为这应该有效。

UPD:正如注释中指出的，将数组放入向量是非法的。

Answer 2

用unsigned int[2]代替pair<unsigned int,int unsigned>。你会更快乐的。