[Bug c++/115476] [13/14/15 Regression] __has_unique_object_representation ICE with array of uninstantiated type of unknown bound

[mital at mitalashok dot co.uk via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115476

--- Comment #5 from Mital Ashok <mital at mitalashok dot co.uk> ---
Sorry, I misread the cppreference quote. Though it should be ill-formed instead
of UB I think.

GCC also crashes on this invalid code:

    class Foo;
    static_assert(__has_unique_object_representations(Foo[]));