https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102984
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> This is probably the _Temporary_value helper used by std::vector.
Nope, that uses a correctly-aligned buffer.
The misaligned object is the default-initialized rvalue created here:
locks.push_back(spinlock());
There is nothing libstdc++ can do here, that misaligned object is created by
the compiler before any libstdc++ sees it.
However, I'm unable to reproduce this with 11.1 or any other version.
