[Bug c++/92194] maybe-uninitialized false positive with c++2a

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92194

--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
With -Wsystem-headers you also get the warning in C++17 (and it is actually a
bit  more informative, at least it says where it is used).