[Bug libstdc++/81749] std::align: runtime error: negation of 8 cannot be represented in type 'size_t'

[max at maxbruckner dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81749

--- Comment #6 from Max Bruckner <max at maxbruckner dot de> ---
Oh, you're right, unsigned overflow is defined of course. I guess I should
report a bug with UBSan then to get a suppression included for libstdc++.