[Bug sanitizer/59258] usan: ICE(segfault): stack-buffer-overflow with -fsanitize=undefined

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59258

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Why?  We are already checking that nelts is < 3.  See the gcc_checking_assert
above.