[Bug c++/111123] Warning about "used uninitialized" member shown or hidden randomly

[agriff at tin dot it via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111123

--- Comment #1 from Andrea Griffini <agriff at tin dot it> ---
Forgot to say that -O3 is needed to see the warning (this is however expected)