https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126436
--- Comment #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #2)
> > If so then this would be a libsanitizer issue were the upstream is LLVM.
> Oh, I thought GCC had its own version of libsanitizer.
It is a vendored version of it but it is synced with LLVM at least once a
release and sometimes fixes are cherry-picked ("backported") to GCC version
