[Bug sanitizer/81148] UBSAN: two more false positives

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81148

--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
That causes miscompiled cc1plus.  Richi, any ideas?