bug#41321: 27.0.91; Emacs aborts due to invalid pseudovector objects

[Pip Cet]

On Sat, May 30, 2020 at 9:27 PM Paul Eggert <eggert@cs.ucla.edu> wrote:
> > Is it misaligned pointers into floats you're worried about?
>
> Yes, and it's plausible there will be pointers misaligned because
> Lisp_Float has been added to them.

Sorry for being dense, but I still don't understand. This is on
!LSB_TAG machines, where Lisp_Float does not affect the representation
of the lower 32 bits. On LSB_TAG machines, the other code path is
taken.