[Bug c++/93870] [8/9/10 Regression] User-defined conversion function not working in evaluation of template argument

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93870

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Clearly we're trying to take the address of a TARGET_EXPR:

TARGET_EXPR <D.2381, operator~ (0)>

That's bad and we've had PRs about this in the past, e.g. Bug 87145.  I suspect
the fix might be along the same lines.