GDB (with python support) crashes with following description:

C:/MinGW/msys/1.0/src/gdb/gdb-python-7.4-1-mingw32-src/gdb-python-7.4-2/src/gdb-7.4/gdb/utils.c:1246: internal-error: virtual memory exhausted: can't allocate 2009222722 bytes.

when stepping into x constructor (main) in this C++ code:

#include <string>

class T
{
public:
    T(std::string str)
    {
    }
};


int main() {
    std::string str = "";
    T x(str);
    return 0;
}