[Bug middle-end/118819] [15 Regression] runtime error: signed integer overflow during bootstrap

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118819

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
With export
UBSAN_OPTIONS="halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1",
you should be able to get a nice backtrace. You can drop the halt/abort bits if
you want.