[Bug sanitizer/80536] [6/7/8 Regression] UBSAN: compile time segfault

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80536

--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Removing the fold() call doesn't regress anything, btw.