Restarting an application waiting for input on STDIN freezes QtCreator

Restarting an application that waits for input on the terminal with CTRL+R freezes QtCreator for around 30 seconds.

#include <iostream>
#include <string>int main(int argc, char *argv[])
{
    std::string s;
    std::cout << "Enter something: ";
    std::cin >> s;
    std::cout << "You entered: " << s << std::endl;
    return 0;
}

How to reproduce:

1. Start program and wait for "Enter something" displayed.
2. Restart program with CTRL+R without submitting any input to STDIN