Example of default argument of a member function template being a lambda causing GCC 4.8.1 to ICE

default_argument_lambda.cpp

#include <functional>
#include <iostream>
struct herp
{
    template <class T>
    void derp(T something,
              std::function<void()> callback = [](){}) // <-- gcc 4.8.1 explodes here
    {
        std::cout << "Something: " << something << "\n";
        // do some work
        callback();
    }
};

int main()
{
    herp h;
    h.derp(); // by default, I want the callback to do nothing
    h.derp([](){ std::cout << "wee I'm called by derp!\n" }); // but I can give a lambda to call if I want
}