[Bug c++/97814] Copy constructor deletion not recognized in initialization list with -std=c++17

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97814

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There is no copy in C++17, it is elided, so lock(S(1)) is equivalent to lock(1)
in C++17, and that constructor exists.

GCC is correct.