[Bug sanitizer/66452] [6 Regression] [UBSAN] *.Lubsan_data0' defined but not used

[dimhen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452

--- Comment #3 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
r224136 PASS
r224161 FAIL (stage1 compiler due broken bootstrap)