QVector crashes when array size is big

[Sheng]

#include<QApplication>
#include<iostream>
#include<QString>
#include<QVector>
 
struct myStruc
{
 QString name;
 int array[3000*2000];
};
 
int main(int argc,char* argv[])
{
  QApplication app(argc,argv);
  QVector<myStruc> myVector;
  myStruc currentStruc;
  for (int i=0;i<5;i++)
   {
     currentStruc.name+="a";
     currentStruc.array[0]=i;
     myVector.push_back(currentStruc);
   }
  for(int i=0;i<5;i++)
   {
     std::cout<<myVector[i].name.toStdString()<<"   "<<myVector[i].array[0]<<std::endl;
   }
 myVector.clear();
 return app.exec();
}

#include<QApplication>
#include<iostream>
#include<QString>
#include<QVector>

struct myStruc
{
 QString name;
 int array[3000*2000];
};

int main(int argc,char* argv[])
{
  QApplication app(argc,argv);
  QVector<myStruc> myVector;
  myStruc currentStruc;
  for (int i=0;i<5;i++)
   {
     currentStruc.name+="a";
     currentStruc.array[0]=i;
     myVector.push_back(currentStruc);
   }
  for(int i=0;i<5;i++)
   {
     std::cout<<myVector[i].name.toStdString()<<"   "<<myVector[i].array[0]<<std::endl;
   }
 myVector.clear();
 return app.exec();
}

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Compile fine, got "segmentation fault" error when run it.
It works OK if I decrease array size to 3000, any solutions?
Thanks in advance.