[Bug lto/115223] [15 regression] ICE when building KDE kontrast with LTO (error: ‘TYPE_CANONICAL’ has different ‘TYPE_CANONICAL’)

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115223

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
Reduced:
```
using type = void;
template <typename T> void checkSwap(T &t) noexcept(noexcept(t));
void qSwap(int value1) noexcept(noexcept(checkSwap(value1)));
type callDestructorIfNecessary(int &) noexcept {}
```

As usual, my C++ is lacking, so it might be possible to tidy this up.