std::regex crashes when matching long lines.

Here is an example:


#include <regex>
#include <iostream>
 
int main()
{
    std::string s (100'000, '*');
    std::smatch m;
    std::regex r ("^(.*?)$");

    std::regex_search (s, m, r);

    std::cout << s .substr (0, 10) << std::endl;
    std::cout << m  .str (1) .substr (0, 10) << std::endl;
}


It turns out that std::regex_search operator .* is implemented recursively which result in this example in a stack overflow.