[Bug c++/90196] std:: types unused without warnings but simple type not affected

[maxim.prohorenko at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90196

--- Comment #3 from Максим Прохоренко <maxim.prohorenko at gmail dot com> ---
Allocate GiB of unused memory and don't warn about it? But 1 simple double - it
is a big problem.

For std:: objects with side effect - OK!
But for simple unused vector or set or map???