When I enter a lambda expression to Qt Creator, it will underline the whole line with green and this underline displays a tooltip that says "undefined function".
This happens both when I assign a lambda function to a function pointer, and also when I pass a lambda function as a parameter.

Example code snippet:

bool (*is_this_the_answer)(int) = [](int x)

;
int i;
std::cin >> i;
std::cout << (is_this_the_answer ? "yep!" : "nope!") << std::endl;

Note that Qt Creator also messes up the auto-indentation after it encounters a line with a lambda expression.