c++ - msvc std::function doesn't accept generic lambda with a nested lambda

The following works with gcc 5.2 and clang 3.7 but fails with msvc 2015:

#include 

int main()
{
  auto const foo = [](auto&& i) {

    auto const bar = []{ return 100; };
    return bar();
  };

  std::function fn = foo;
  return 0;
}

Is it a bug in msvc or are gcc and clang too lax?