[Bug c++/114569] GCC accepts forming pointer to function type which is ref qualified

[jlame646 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114569

--- Comment #2 from Jason Liam <jlame646 at gmail dot com> ---
(In reply to Marek Polacek from comment #1)
> So the code should compile.

But https://timsong-cpp.github.io/cppwp/n4950/dcl.ptr#4.sentence-2 says:

> [Note 1: [...] Forming a function pointer type is ill-formed if the function 
> type has cv-qualifiers or a ref-qualifier; see [dcl.fct]. [...]]

And since `FTDecay<int()&>` is `int (*)() &`, this should be ill-formed?