[Bug c++/78022] constexpr int template rejected unless constructor is used before hand

[fiesh at zefix dot tv]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78022

--- Comment #5 from fiesh at zefix dot tv ---
The code still does not compile with gcc-8.2 but does compile on trunk now!

Conversely, clang consistently refuses to compile it since clang-5.

So I guess this can be closed, unless clang is actually correct and my bug
report was flawed because the code is actually invalid?

For what it's worth, godbolt shows that both MSVC and ICC accept the code as
valid.