[Issue 21804] Type list (tuple) not expanded in delegate during IFTI

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21804

--- Comment #1 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
Found a really weird workaround:

        fun     ((result) {             }); // OK
        fun     ((result) { result.m(); }); // OK ?????

Looks like we can trick the compiler into doing the right thing by first making
a dummy instantiation which does not access `result`.

--