[Bug debug/67482] dwarf2out.c sanitizer detects undefined behaviour negation of -9223372036854775808

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67482

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I cannot reproduce the runtime error with my instrumented trunk (7.0).

nor with instrumented 6.1.1.