Using templated method of a templated class

Question

Suppose I have some struct/class:

#include <cstdio>

template <typename T>
struct MyClass
{
    template <int U>
    int foo() {
        return U;
    }
};

int main() {
    MyClass<double> myClass;
    int ret = myClass.foo<5>();
    printf("%d\n", ret);
}

This works with no issues.

Why can't I create a templated function that creates an instance of MyClass and uses the templated foo() method?

template <typename T>
int bar() {
    MyClass<T> myClass;
    return myClass.foo<6>();
}